Celebrating 19 Years on the Web
TODAY IN SCIENCE HISTORY ®
Find science on or your birthday

Today in Science History - Quickie Quiz
Who said: “I seem to have been only like a boy playing on the seashore, ... finding a smoother pebble or a prettier shell ... whilst the great ocean of truth lay all undiscovered before me.”
more quiz questions >>
Home > Category Index for Science Quotations > Category Index I > Category: Ion

Ion Quotes (21 quotes)

... every chemical combination is wholly and solely dependent on two opposing forces, positive and negative electricity, and every chemical compound must be composed of two parts combined by the agency of their electrochemical reaction, since there is no third force. Hence it follows that every compound body, whatever the number of its constituents, can be divided into two parts, one of which is positively and the other negatively electrical.
Essai sur la théorie des proportions chemiques (1819), 98. Quoted by Henry M. Leicester in article on Bessel in Charles Coulston Gillespie (editor), Dictionary of Scientific Biography (1981), Vol. 2, 94.
Science quotes on:  |  Body (537)  |  Chemical (292)  |  Combination (144)  |  Compound (113)  |  Constituent (45)  |  Divided (50)  |  Electrical (57)  |  Electricity (159)  |  Electrochemical (4)  |  Follow (378)  |  Force (487)  |  Must (1526)  |  Negative (63)  |  Number (699)  |  Other (2236)  |  Positive (94)  |  Reaction (104)  |  Two (937)  |  Whatever (234)  |  Wholly (88)

After all, we scientific workers … like women, are the victims of fashion: at one time we wear dissociated ions, at another electrons; and we are always loth to don rational clothing; some fixed belief we must have manufactured for us: we are high or low church, of this or that degree of nonconformity, according to the school in which we are brought up—but the agnostic is always rare of us and of late years the critic has been taboo.
'The Thirst of Salted Water or the Ions Overboard', Science Progress (1909), 3, 643.
Science quotes on:  |  According (237)  |  Agnostic (9)  |  All (4108)  |  Belief (578)  |  Church (56)  |  Degree (276)  |  Electron (93)  |  High (362)  |  Late (118)  |  Low (80)  |  Men Of Science (143)  |  Must (1526)  |  Rare (89)  |  Rational (90)  |  School (219)  |  Scientific (941)  |  Taboo (5)  |  Time (1877)  |  Victim (35)  |  Year (933)

Among nonclassical ions the ratio of conceptual difficulty to molecular weight reaches a maximum with the cyclopropylcarbinyl-cyclobutyl system.
Nonclassical Ions (1965), 272.
Science quotes on:  |  Difficulty (196)  |  Molecule (174)  |  Ratio (39)  |  System (537)  |  Weight (134)

An unelectrified atom is so elusive that unless more than a million million are present we have no means sufficiently sensitive to detect them, or, to put it another way, unless we had a better test for a man than for an unelectrified molecule, we should be unable to find out that the earth was inhabited. … A billion unelectrified atoms may escape our observation, whereas a dozen or so electrified ones are detected without difficulty.
From the Romanes Lecture (10 Jun 1914) delivered in the Sheldonian Theatre, published as The Atomic Theory (1914), 9.
Science quotes on:  |  Atom (355)  |  Better (486)  |  Billion (95)  |  Detect (44)  |  Difficulty (196)  |  Dozen (10)  |  Earth (996)  |  Electrified (2)  |  Elusive (8)  |  Escape (80)  |  Find (998)  |  Inhabit (16)  |  Man (2251)  |  Mean (809)  |  Means (579)  |  Million (114)  |  Molecule (174)  |  More (2559)  |  Observation (555)  |  Present (619)  |  Sensitive (14)  |  Sufficiently (9)  |  Test (211)  |  Way (1217)

As usual, the author in his thorough, unobjective fashion has marshalled up all the good, indifferent and bad arguments ... I offer the following detailed comments ... though I realize that many of them will arouse him to a vigorous, if not violent rebuttal. In order to preserve the pH of Dr. Brown's digestive system I would not require a rebuttal as a condition of publication...
With heartiest greetings of the season to you and yours! Jack Roberts
PS The above comments should (help) to reduce your winter heating bill!
Jack Roberts' referee's report on Herbert Charles Brown's paper with Rachel Kornblum on the role of steric strain in carbonium ion reactions.
As quoted by D. A. Davenport, in 'On the Comparative Unimportance of the Invective Effect', Chemtech (Sep 1987), 17, 530.
Science quotes on:  |   (2863)  |  All (4108)  |  Argument (138)  |  Author (167)  |  Bad (180)  |  Brown (23)  |  Condition (356)  |  Detail (146)  |  Good (889)  |  Greeting (9)  |  Offer (141)  |  Order (632)  |  Paper (182)  |  Preserve (83)  |  Publication (101)  |  Reaction (104)  |  Realize (147)  |  Reduce (94)  |  Referee (7)  |  Require (219)  |  Role (86)  |  Season (47)  |  System (537)  |  Thorough (40)  |  Will (2355)  |  Winter (44)

I am now convinced that we have recently become possessed of experimental evidence of the discrete or grained nature of matter, which the atomic hypothesis sought in vain for hundreds and thousands of years. The isolation and counting of gaseous ions, on the one hand, which have crowned with success the long and brilliant researches of J.J. Thomson, and, on the other, agreement of the Brownian movement with the requirements of the kinetic hypothesis, established by many investigators and most conclusively by J. Perrin, justify the most cautious scientist in now speaking of the experimental proof of the atomic nature of matter, The atomic hypothesis is thus raised to the position of a scientifically well-founded theory, and can claim a place in a text-book intended for use as an introduction to the present state of our knowledge of General Chemistry.
In Grundriss der allgemeinen Chemie (4th ed., 1909), Preface, as cited by Erwin N. Hiebert and Hans-Gunther Korber in article on Ostwald in Charles Coulston Gillespie (ed.), Dictionary of Scientific Biography Supplement 1, Vol 15-16, 464.
Science quotes on:  |  Agreement (53)  |  Atom (355)  |  Become (815)  |  Book (392)  |  Brilliant (53)  |  Robert Brown (2)  |  Caution (24)  |  Chemistry (353)  |  Claim (146)  |  Conviction (97)  |  Counting (26)  |  Crown (38)  |  Discrete (11)  |  Evidence (248)  |  Experiment (695)  |  Experimental (192)  |  Gas (83)  |  General (511)  |  Grain (50)  |  Granular (4)  |  Hundred (229)  |  Hypothesis (296)  |  Introduction (35)  |  Investigator (67)  |  Isolation (31)  |  Kinetic (12)  |  Knowledge (1529)  |  Long (790)  |  Matter (798)  |  Most (1731)  |  Movement (155)  |  Nature (1926)  |  Other (2236)  |  Jean Perrin (2)  |  Possess (156)  |  Possession (65)  |  Present (619)  |  Proof (287)  |  Recent (77)  |  Requirement (63)  |  Research (664)  |  Scientist (820)  |  Seeking (31)  |  Speaking (119)  |  State (491)  |  Success (302)  |  Text-Book (5)  |  Theory (970)  |  Sir J.J. Thomson (18)  |  Thousand (331)  |  Use (766)  |  Vain (83)  |  Year (933)

I have taken your advice, and the names used are anode cathode anions cations and ions; the last I shall have but little occasion for. I had some hot objections made to them here and found myself very much in the condition of the man with his son and ass who tried to please every body; but when I held up the shield of your authority, it was wonderful to observe how the tone of objection melted away.
Letter to William Whewell, 15 May 1834. In Frank A. J. L. James (ed.), The Correspondence of Michael Faraday (1993), Vol. 2, 186.
Science quotes on:  |  Advice (55)  |  Anion (4)  |  Anode (4)  |  Authority (95)  |  Body (537)  |  Cation (3)  |  Condition (356)  |  Electrolysis (7)  |  Hot (60)  |  Last (426)  |  Little (707)  |  Man (2251)  |  Myself (212)  |  Name (333)  |  Nomenclature (146)  |  Objection (32)  |  Observe (168)  |  Occasion (85)  |  Please (65)  |  Shield (6)  |  Tone (22)  |  William Whewell (70)  |  Wonderful (149)

I require a term to express those bodies which can pass to the electrodes, or, as they are usually called, the poles. Substances are frequently spoken of as being electro-negative, or electro-positive, according as they go under the supposed influence of a direct attraction to the positive or negative pole. But these terms are much too significant for the use to which I should have to put them; for though the meanings are perhaps right, they are only hypothetical, and may be wrong; and then, through a very imperceptible, but still very dangerous, because continual, influence, they do great injury to science, by contracting and limiting the habitual view of those engaged in pursuing it. I propose to distinguish these bodies by calling those anions which go to the anode of the decomposing body; and those passing to the cathode, cations; and when I have occasion to speak of these together, I shall call them ions.
Philosophical Transactions of the Royal Society of London, 1834, 124, 79.
Science quotes on:  |  According (237)  |  Anion (4)  |  Anode (4)  |  Attraction (56)  |  Being (1278)  |  Body (537)  |  Call (769)  |  Cation (3)  |  Continual (43)  |  Dangerous (105)  |  Direct (225)  |  Distinguish (160)  |  Do (1908)  |  Electrolysis (7)  |  Express (186)  |  Great (1574)  |  Influence (222)  |  Injury (36)  |  Meaning (233)  |  Negative (63)  |  Nomenclature (146)  |  Occasion (85)  |  Pass (238)  |  Passing (76)  |  Pole (46)  |  Positive (94)  |  Pursuing (27)  |  Require (219)  |  Right (452)  |  Science (3879)  |  Significant (74)  |  Speak (232)  |  Still (613)  |  Substance (248)  |  Term (349)  |  Terms (184)  |  Through (849)  |  Together (387)  |  Use (766)  |  Usually (176)  |  View (488)  |  Wrong (234)

If a mixture of different kinds of electrified atoms is moving along in one stream, then when electric and magnetic forces are applied to the stream simultaneously, the different kinds of atoms are sorted out, and the original stream is divided up into a number of smaller streams separated from each other. The particles in any one of the smaller streams are all of the same kind.
From the Romanes Lecture (10 Jun 1914) delivered in the Sheldonian Theatre, published as The Atomic Theory (1914), 9.
Science quotes on:  |  All (4108)  |  Applied (177)  |  Apply (160)  |  Atom (355)  |  Different (577)  |  Divided (50)  |  Electric (76)  |  Electrified (2)  |  Force (487)  |  Kind (557)  |  Magnetic (44)  |  Mass Spectrometer (2)  |  Mixture (41)  |  Move (216)  |  Number (699)  |  Other (2236)  |  Particle (194)  |  Simultaneous (22)  |  Sort (49)  |  Stream (81)

If we ascribe the ejection of the proton to a Compton recoil from a quantum of 52 x 106 electron volts, then the nitrogen recoil atom arising by a similar process should have an energy not greater than about 400,000 volts, should produce not more than about 10,000 ions, and have a range in the air at N.T.P. of about 1-3mm. Actually, some of the recoil atoms in nitrogen produce at least 30,000 ions. In collaboration with Dr. Feather, I have observed the recoil atoms in an expansion chamber, and their range, estimated visually, was sometimes as much as 3mm. at N.T.P.
These results, and others I have obtained in the course of the work, are very difficult to explain on the assumption that the radiation from beryllium is a quantum radiation, if energy and momentum are to be conserved in the collisions. The difficulties disappear, however, if it be assumed that the radiation consists of particles of mass 1 and charge 0, or neutrons. The capture of the a-particle by the Be9 nucleus may be supposed to result in the formation of a C12 nucleus and the emission of the neutron. From the energy relations of this process the velocity of the neutron emitted in the forward direction may well be about 3 x 109 cm. per sec. The collisions of this neutron with the atoms through which it passes give rise to the recoil atoms, and the observed energies of the recoil atoms are in fair agreement with this view. Moreover, I have observed that the protons ejected from hydrogen by the radiation emitted in the opposite direction to that of the exciting a-particle appear to have a much smaller range than those ejected by the forward radiation.
This again receives a simple explanation on the neutron hypothesis.
'Possible Existence of a Neutron', Letter to the Editor, Nature, 1932, 129, 312.
Science quotes on:  |  Agreement (53)  |  Air (347)  |  Arising (22)  |  Assumption (92)  |  Atom (355)  |  Beryllium (3)  |  Charge (59)  |  Collaboration (15)  |  Collision (15)  |  Consist (223)  |  Course (409)  |  Difficult (246)  |  Direction (175)  |  Disappear (82)  |  Electron (93)  |  Energy (344)  |  Exciting (47)  |  Expansion (41)  |  Explain (322)  |  Explanation (234)  |  Formation (96)  |  Forward (102)  |  Greater (288)  |  Hydrogen (75)  |  Hypothesis (296)  |  Mass (157)  |  Momentum (9)  |  More (2559)  |  Neutron (17)  |  Nitrogen (26)  |  Nucleus (49)  |  Observed (149)  |  Obtain (163)  |  Opposite (104)  |  Other (2236)  |  Particle (194)  |  Process (423)  |  Proton (21)  |  Quantum (117)  |  Radiation (44)  |  Range (99)  |  Receive (114)  |  Result (677)  |  Rise (166)  |  Simple (406)  |  Through (849)  |  Velocity (48)  |  View (488)  |  Work (1351)

It is the task of science, as a collective human undertaking, to describe from the external side, (on which alone agreement is possible), such statistical regularity as there is in a world “in which every event has a unique aspect, and to indicate where possible the limits of such description. It is not part of its task to make imaginative interpretation of the internal aspect of reality—what it is like, for example, to be a lion, an ant or an ant hill, a liver cell, or a hydrogen ion. The only qualification is in the field of introspective psychology in which each human being is both observer and observed, and regularities may be established by comparing notes. Science is thus a limited venture. It must act as if all phenomena were deterministic at least in the sense of determinable probabilities. It cannot properly explain the behaviour of an amoeba as due partly to surface and other physical forces and partly to what the amoeba wants to do, with out danger of something like 100 per cent duplication. It must stick to the former. It cannot introduce such principles as creative activity into its interpretation of evolution for similar reasons. The point of view indicated by a consideration of the hierarchy of physical and biological organisms, now being bridged by the concept of the gene, is one in which science deliberately accepts a rigorous limitation of its activities to the description of the external aspects of events. In carrying out this program, the scientist should not, however, deceive himself or others into thinking that he is giving an account of all of reality. The unique inner creative aspect of every event necessarily escapes him.
In 'Gene and Organism', American Naturalist, (1953), 87, 17.
Science quotes on:  |  Accept (191)  |  Account (192)  |  Act (272)  |  Activity (210)  |  Agreement (53)  |  All (4108)  |  Alone (311)  |  Amoeba (20)  |  Ant (28)  |  Aspect (124)  |  Behaviour (41)  |  Being (1278)  |  Biological (137)  |  Both (493)  |  Carrying Out (13)  |  Cell (138)  |  Concept (221)  |  Consideration (139)  |  Creative (137)  |  Danger (115)  |  Deceive (26)  |  Describe (128)  |  Do (1908)  |  Due (141)  |  Escape (80)  |  Event (216)  |  Evolution (590)  |  Explain (322)  |  Field (364)  |  Force (487)  |  Former (137)  |  Gene (98)  |  Hierarchy (17)  |  Himself (461)  |  Human (1468)  |  Human Being (175)  |  Hydrogen (75)  |  Indicate (61)  |  Inner (71)  |  Internal (66)  |  Interpretation (85)  |  Introduce (63)  |  Limit (280)  |  Limitation (47)  |  Limited (101)  |  Lion (22)  |  Liver (19)  |  Must (1526)  |  Necessarily (135)  |  Observation (555)  |  Observed (149)  |  Organism (220)  |  Other (2236)  |  Physical (508)  |  Point (580)  |  Point Of View (80)  |  Possible (552)  |  Principle (507)  |  Psychology (154)  |  Qualification (14)  |  Reality (261)  |  Reason (744)  |  Regularity (40)  |  Rigorous (48)  |  Science (3879)  |  Scientist (820)  |  Sense (770)  |  Side (233)  |  Something (719)  |  Statistics (155)  |  Surface (209)  |  Task (147)  |  Thinking (414)  |  Undertaking (16)  |  Unique (67)  |  View (488)  |  Want (497)  |  World (1774)

MAGNITUDE, n. Size. Magnitude being purely relative, nothing is large and nothing small. If everything in the universe were increased in bulk one thousand diameters nothing would be any larger than it was before, but if one thing remained unchanged all the others would be larger than they had been. To an understanding familiar with the relativity of magnitude and distance the spaces and masses of the astronomer would be no more impressive than those of the microscopist. For anything we know to the contrary, the visible universe may be a small part of an atom, with its component ions, floating in the life-fluid (luminiferous ether) of some animal. Possibly the wee creatures peopling the corpuscles of our own blood are overcome with the proper emotion when contemplating the unthinkable distance from one of these to another.
The Collected Works of Ambrose Bierce (1911), Vol. 7, The Devil's Dictionary,  209.
Science quotes on:  |  All (4108)  |  Animal (617)  |  Astronomer (93)  |  Atom (355)  |  Being (1278)  |  Blood (134)  |  Bulk (24)  |  Component (48)  |  Contemplating (11)  |  Contrary (141)  |  Corpuscle (13)  |  Creature (233)  |  Diameter (28)  |  Distance (161)  |  Emotion (100)  |  Ether (35)  |  Everything (476)  |  Fluid (51)  |  Humour (116)  |  Impressive (25)  |  Know (1518)  |  Large (394)  |  Life (1795)  |  Magnitude (83)  |  More (2559)  |  Nothing (966)  |  Other (2236)  |  Overcome (39)  |  Possibly (111)  |  Proper (144)  |  Purely (109)  |  Relativity (88)  |  Remain (349)  |  Small (477)  |  Space (500)  |  Thing (1915)  |  Thousand (331)  |  Understanding (513)  |  Universe (857)  |  Unthinkable (8)  |  Visible (84)

MOLECULE, n. The ultimate, indivisible unit of matter. It is distinguished from the corpuscle, also the ultimate, indivisible unit of matter, by a closer resemblance to the atom, also the ultimate, indivisible unit of matter. Three great scientific theories of the structure of the universe are the molecular, the corpuscular and the atomic. A fourth affirms, with Haeckel, the condensation or precipitation of matter from ether—whose existence is proved by the condensation or precipitation. The present trend of scientific thought is toward the theory of ions. The ion differs from the molecule, the corpuscle and the atom in that it is an ion. A fifth theory is held by idiots, but it is doubtful if they know any more about the matter than the others.
The Collected Works of Ambrose Bierce (1911), Vol. 7, The Devil's Dictionary,  220-221.
Science quotes on:  |  Atom (355)  |  Closer (43)  |  Condensation (12)  |  Corpuscle (13)  |  Differ (85)  |  Distinguish (160)  |  Distinguished (83)  |  Doubtful (29)  |  Ether (35)  |  Existence (456)  |  Great (1574)  |  Humour (116)  |  Idiot (22)  |  Indivisible (21)  |  Know (1518)  |  Matter (798)  |  Molecule (174)  |  More (2559)  |  Other (2236)  |  Precipitation (7)  |  Present (619)  |  Resemblance (38)  |  Scientific (941)  |  Scientific Theory (24)  |  Scientific Thought (17)  |  Structure (344)  |  Theory (970)  |  Thought (953)  |  Trend (22)  |  Ultimate (144)  |  Universe (857)

Of the nucleosides from deoxyribonucleic acids, all that was known with any certainty [in the 1940s] was that they were 2-deoxy-­D-ribosides of the bases adenine, guanine, thymine and cytosine and it was assumed that they were structurally analogous to the ribonucleosides. The chemistry of the nucleotides—the phosphates of the nucleosides—was in a correspondingly primitive state. It may well be asked why the chemistry of these groups of compounds was not further advanced, particularly since we recognize today that they occupy a central place in the history of the living cell. True, their full significance was for a long time unrecognized and emerged only slowly as biochemical research got into its stride but I think a more important reason is to be found in the physical properties of compounds of the nucleotide group. As water-soluble polar compounds with no proper melting points they were extremely difficult to handle by the classic techniques of organic chemistry, and were accordingly very discouraging substances to early workers. It is surely no accident that the major advances in the field have coincided with the appearance of new experimental techniques such as paper and ion-exchange chromatography, paper electrophoresis, and countercurrent distribution, peculiarly appropriate to the compounds of this group.
In 'Synthesis in the Study of Nucleotides', Nobel Lecture, 11 December 1957. In Nobel Lectures: Chemistry 1942-1962 (1964), 524.
Science quotes on:  |  Accident (88)  |  Acid (83)  |  Adenine (5)  |  Advance (280)  |  All (4108)  |  Analogous (5)  |  Appearance (140)  |  Appropriate (61)  |  Ask (411)  |  Base (117)  |  Biochemistry (49)  |  Cell (138)  |  Central (80)  |  Certainty (174)  |  Chemistry (353)  |  Compound (113)  |  Cytosine (5)  |  Deoxyribonucleic Acid (3)  |  Difficult (246)  |  Distribution (50)  |  Early (185)  |  Electrophoresis (2)  |  Exchange (37)  |  Experimental (192)  |  Field (364)  |  Guanine (4)  |  Handle (28)  |  History (673)  |  Known (454)  |  Living (491)  |  Long (790)  |  Major (84)  |  Melting Point (3)  |  More (2559)  |  New (1216)  |  Nucleotide (6)  |  Organic (158)  |  Organic Chemistry (40)  |  Paper (182)  |  Phosphate (5)  |  Physical (508)  |  Point (580)  |  Polar (12)  |  Primitive (75)  |  Proper (144)  |  Reason (744)  |  Recognize (125)  |  Research (664)  |  Significance (113)  |  Soluble (5)  |  State (491)  |  Stride (15)  |  Structure (344)  |  Substance (248)  |  Surely (101)  |  Technique (80)  |  Think (1086)  |  Thymine (5)  |  Time (1877)  |  Today (314)  |  Water (481)  |  Why (491)

One of the many useful properties of giant nerve fibres is that samples of protoplasm or axoplasm as it is usually called can be obtained by squeezing out the contents from a cut end … As in many other cells there is a high concentration of potassium ions and relatively low concentration of sodium and chloride ions. This is the reverse of the situation in the animals’ blood or in sea water, where sodium and chloride are the dominant ions and potassium is relatively dilute.
The Conduction of the Nervous Impulse (1964), 27.
Science quotes on:  |  Animal (617)  |  Blood (134)  |  Call (769)  |  Cell (138)  |  Concentration (29)  |  Cut (114)  |  Dominant (26)  |  End (590)  |  Giant (67)  |  High (362)  |  Low (80)  |  Nerve (79)  |  Obtain (163)  |  Other (2236)  |  Potassium (11)  |  Protoplasm (13)  |  Reverse (33)  |  Sample (19)  |  Sea (308)  |  Situation (113)  |  Sodium (14)  |  Useful (250)  |  Usually (176)  |  Water (481)

The description of some of the experiments, which are communicated here, was completely worked out at my writing-table, before I had seen anything of the phenomena in question. After making the experiments on the following day, it was found that nothing in the description required to be altered. I do not mention this from feelings of pride, but in order to make clear the extraordinary ease and security with which the relations in question can be considered on the principles of Arrhenius' theory of free ions. Such facts speak more forcibly then any polemics for the value of this theory .
Philosophical Magazine (1891), 32, 156.
Science quotes on:  |  Alter (62)  |  Alteration (30)  |  Altered (32)  |  Svante Arrhenius (11)  |  Communication (94)  |  Completely (135)  |  Completeness (19)  |  Consider (416)  |  Consideration (139)  |  Description (84)  |  Do (1908)  |  Ease (35)  |  Experiment (695)  |  Extraordinary (79)  |  Fact (1210)  |  Facts (553)  |  Feeling (250)  |  Feelings (52)  |  Free (232)  |  Making (300)  |  Mention (82)  |  More (2559)  |  Nothing (966)  |  Observation (555)  |  Order (632)  |  Phenomenon (318)  |  Polemic (3)  |  Pride (78)  |  Principle (507)  |  Question (621)  |  Relation (157)  |  Required (108)  |  Security (47)  |  Speak (232)  |  Table (104)  |  Theory (970)  |  Value (365)  |  Work (1351)  |  Writing (189)

The discovery of an interaction among the four hemes made it obvious that they must be touching, but in science what is obvious is not necessarily true. When the structure of hemoglobin was finally solved, the hemes were found to lie in isolated pockets on the surface of the subunits. Without contact between them how could one of them sense whether the others had combined with oxygen? And how could as heterogeneous a collection of chemical agents as protons, chloride ions, carbon dioxide, and diphosphoglycerate influence the oxygen equilibrium curve in a similar way? It did not seem plausible that any of them could bind directly to the hemes or that all of them could bind at any other common site, although there again it turned out we were wrong. To add to the mystery, none of these agents affected the oxygen equilibrium of myoglobin or of isolated subunits of hemoglobin. We now know that all the cooperative effects disappear if the hemoglobin molecule is merely split in half, but this vital clue was missed. Like Agatha Christie, Nature kept it to the last to make the story more exciting. There are two ways out of an impasse in science: to experiment or to think. By temperament, perhaps, I experimented, whereas Jacques Monod thought.
From essay 'The Second Secret of Life', collected in I Wish I'd Made You Angry Earlier (1998), 263-5.
Science quotes on:  |  Agent (70)  |  All (4108)  |  Binding (9)  |  Carbon (65)  |  Carbon Dioxide (22)  |  Chemical (292)  |  Agatha Christie (7)  |  Clue (17)  |  Collection (64)  |  Combination (144)  |  Common (436)  |  Contact (65)  |  Cooperation (32)  |  Curve (49)  |  Disappear (82)  |  Discovery (780)  |  Effect (393)  |  Equilibrium (33)  |  Excitement (50)  |  Exciting (47)  |  Experiment (695)  |  Half (56)  |  Hemoglobin (5)  |  Heterogeneity (4)  |  Impasse (2)  |  Influence (222)  |  Interaction (46)  |  Isolation (31)  |  Know (1518)  |  Last (426)  |  Lie (364)  |  Merely (316)  |  Miss (51)  |  Molecule (174)  |  Jacques Monod (21)  |  More (2559)  |  Must (1526)  |  Mystery (177)  |  Nature (1926)  |  Necessarily (135)  |  Necessity (191)  |  Obvious (126)  |  Other (2236)  |  Oxygen (66)  |  Plausibility (7)  |  Plausible (22)  |  Pocket (11)  |  Proton (21)  |  Science (3879)  |  Sense (770)  |  Site (14)  |  Solution (267)  |  Split (13)  |  Story (118)  |  Structure (344)  |  Surface (209)  |  Temperament (17)  |  Think (1086)  |  Thinking (414)  |  Thought (953)  |  Touch (141)  |  Touching (16)  |  Truth (1057)  |  Turn (447)  |  Two (937)  |  Vital (85)  |  Way (1217)  |  Wrong (234)

The study of the reactivity of metal ion complexes—the birth of which I have witnessed and which I have helped to nurture … is still in its infancy; it too is flourishing.
Speech at the Nobel Banquet (10 Dec 1983) for his Nobel Prize in Chemistry. In Wilhelm Odelberg (ed.), Les Prix Nobel: The Nobel Prizes (1984), 43.
Science quotes on:  |  Birth (147)  |  Flourish (34)  |  Flourishing (6)  |  Infancy (12)  |  Metal (84)  |  Nurture (16)  |  Still (613)  |  Study (653)  |  Witness (54)

To-day, science has withdrawn into realms that are hardly understanded of the people. Biology means very largely histology, the study of the cell by difficult and elaborate microscopical processes. Chemistry has passed from the mixing of simple substances with ascertained reactions, to an experimentation of these processes under varying conditions of temperature, pressure, and electrification—all requiring complicated apparatus and the most delicate measurement and manipulation. Similarly, physics has outgrown the old formulas of gravity, magnetism, and pressure; has discarded the molecule and atom for the ion, and may in its recent generalizations be followed only by an expert in the higher, not to say the transcendental mathematics.
Anonymous
‘Exit the Amateur Scientist.’ Editorial, The Nation, 23 August 1906, 83, 160.
Science quotes on:  |  All (4108)  |  Apparatus (68)  |  Ascertain (38)  |  Atom (355)  |  Biology (216)  |  Chemistry (353)  |  Complicated (115)  |  Condition (356)  |  Delicate (43)  |  Difficult (246)  |  Discard (29)  |  Elaborate (28)  |  Expert (65)  |  Follow (378)  |  Formula (98)  |  Generalization (57)  |  Gravity (132)  |  Histology (3)  |  Magnetism (41)  |  Manipulation (19)  |  Mathematics (1328)  |  Mean (809)  |  Means (579)  |  Measurement (174)  |  Molecule (174)  |  Most (1731)  |  Old (481)  |  Pass (238)  |  People (1005)  |  Physic (517)  |  Physics (533)  |  Pressure (63)  |  Reaction (104)  |  Realm (85)  |  Recent (77)  |  Research (664)  |  Say (984)  |  Science (3879)  |  Simple (406)  |  Study (653)  |  Substance (248)  |  Temperature (79)  |  Transcendental (10)  |  Understand (606)

We already have anions and cations and now the biochemists and nutritionists are speaking of rat-ions.
Quoted in Ralph Oesper, The Human Side of Scientists (1975), 106.
Science quotes on:  |  Already (222)  |  Anion (4)  |  Biochemist (9)  |  Cation (3)  |  Joke (83)  |  Rat (37)  |  Speaking (119)

We come back then to our records of nervous messages with a reasonable assurance that they do tell us what the message is like. It is a succession of brief waves of surface breakdown, each allowing a momentary leakage of ions from the nerve fibre. The waves can be set up so that they follow one another in rapid or in slow succession, and this is the only form of gradation of which the message is capable. Essentially the same kind of activity is found in all sorts of nerve fibres from all sorts of animals and there is no evidence to suggest that any other kind of nervous transmission is possible. In fact we may conclude that the electrical method can tell us how the nerve fibre carries out its function as the conducting unit of the nervous system, and that it does so by reactions of a fairly simple type.
The Mechanism of Nervous Action (1932), 21.
Science quotes on:  |  Activity (210)  |  All (4108)  |  Animal (617)  |  Assurance (17)  |  Back (390)  |  Brief (36)  |  Capable (168)  |  Conclude (65)  |  Do (1908)  |  Electrical (57)  |  Evidence (248)  |  Fact (1210)  |  Follow (378)  |  Form (959)  |  Function (228)  |  Gradation (17)  |  Kind (557)  |  Message (49)  |  Method (505)  |  Nerve (79)  |  Nervous System (34)  |  Other (2236)  |  Physiology (95)  |  Possible (552)  |  Reaction (104)  |  Record (154)  |  Set (394)  |  Simple (406)  |  Slow (101)  |  Succession (77)  |  Surface (209)  |  System (537)  |  Tell (340)  |  Transmission (34)  |  Type (167)  |  Wave (107)


Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
Quotations by:Albert EinsteinIsaac NewtonLord KelvinCharles DarwinSrinivasa RamanujanCarl SaganFlorence NightingaleThomas EdisonAristotleMarie CurieBenjamin FranklinWinston ChurchillGalileo GalileiSigmund FreudRobert BunsenLouis PasteurTheodore RooseveltAbraham LincolnRonald ReaganLeonardo DaVinciMichio KakuKarl PopperJohann GoetheRobert OppenheimerCharles Kettering  ... (more people)

Quotations about:Atomic  BombBiologyChemistryDeforestationEngineeringAnatomyAstronomyBacteriaBiochemistryBotanyConservationDinosaurEnvironmentFractalGeneticsGeologyHistory of ScienceInventionJupiterKnowledgeLoveMathematicsMeasurementMedicineNatural ResourceOrganic ChemistryPhysicsPhysicianQuantum TheoryResearchScience and ArtTeacherTechnologyUniverseVolcanoVirusWind PowerWomen ScientistsX-RaysYouthZoology  ... (more topics)
Sitewide search within all Today In Science History pages:
Visit our Science and Scientist Quotations index for more Science Quotes from archaeologists, biologists, chemists, geologists, inventors and inventions, mathematicians, physicists, pioneers in medicine, science events and technology.

Names index: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

Categories index: | 1 | 2 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

- 100 -
Sophie Germain
Gertrude Elion
Ernest Rutherford
James Chadwick
Marcel Proust
William Harvey
Johann Goethe
John Keynes
Carl Gauss
Paul Feyerabend
- 90 -
Antoine Lavoisier
Lise Meitner
Charles Babbage
Ibn Khaldun
Euclid
Ralph Emerson
Robert Bunsen
Frederick Banting
Andre Ampere
Winston Churchill
- 80 -
John Locke
Bronislaw Malinowski
Bible
Thomas Huxley
Alessandro Volta
Erwin Schrodinger
Wilhelm Roentgen
Louis Pasteur
Bertrand Russell
Jean Lamarck
- 70 -
Samuel Morse
John Wheeler
Nicolaus Copernicus
Robert Fulton
Pierre Laplace
Humphry Davy
Thomas Edison
Lord Kelvin
Theodore Roosevelt
Carolus Linnaeus
- 60 -
Francis Galton
Linus Pauling
Immanuel Kant
Martin Fischer
Robert Boyle
Karl Popper
Paul Dirac
Avicenna
James Watson
William Shakespeare
- 50 -
Stephen Hawking
Niels Bohr
Nikola Tesla
Rachel Carson
Max Planck
Henry Adams
Richard Dawkins
Werner Heisenberg
Alfred Wegener
John Dalton
- 40 -
Pierre Fermat
Edward Wilson
Johannes Kepler
Gustave Eiffel
Giordano Bruno
JJ Thomson
Thomas Kuhn
Leonardo DaVinci
Archimedes
David Hume
- 30 -
Andreas Vesalius
Rudolf Virchow
Richard Feynman
James Hutton
Alexander Fleming
Emile Durkheim
Benjamin Franklin
Robert Oppenheimer
Robert Hooke
Charles Kettering
- 20 -
Carl Sagan
James Maxwell
Marie Curie
Rene Descartes
Francis Crick
Hippocrates
Michael Faraday
Srinivasa Ramanujan
Francis Bacon
Galileo Galilei
- 10 -
Aristotle
John Watson
Rosalind Franklin
Michio Kaku
Isaac Asimov
Charles Darwin
Sigmund Freud
Albert Einstein
Florence Nightingale
Isaac Newton



who invites your feedback
Thank you for sharing.
Today in Science History
Sign up for Newsletter
with quiz, quotes and more.