Celebrating 20 Years on the Web
TODAY IN SCIENCE HISTORY ®
Find science on or your birthday


Today in Science History - Quickie Quiz
Who said: “I have no satisfaction in formulas unless I feel their arithmetical magnitude.”
more quiz questions >>
Home > Dictionary of Science Quotations > Scientist Names Index T > John Tyndall Quotes > Observation

Thumbnail of John Tyndall (source)
John Tyndall
(2 Aug 1820 - 4 Dec 1893)

Irish physicist who demonstrated why the sky is blue. He wrote on diverse topics, including crystals, glaciers and radiation. His studies also included spontaneous generation, the germ theory of disease and ozone.


John Tyndall Quotes on Observation (4 quotes)

>> Click for 43 Science Quotes by John Tyndall

>> Click for John Tyndall Quotes on | Experiment | Fact | Faraday_Michael | Life | Michael Faraday | Nature | Number | Phenomenon | Power | Science | Truth | Wave |

By teaching us how to cultivate each ferment in its purity—in other words, by teaching us how to rear the individual organism apart from all others,—Pasteur has enabled us to avoid all these errors. And where this isolation of a particular organism has been duly effected it grows and multiplies indefinitely, but no change of it into another organism is ever observed. In Pasteur’s researches the Bacterium remained a Bacterium, the Vibrio a Vibrio, the Penicillium a Penicillium, and the Torula a Torula. Sow any of these in a state of purity in an appropriate liquid; you get it, and it alone, in the subsequent crop. In like manner, sow smallpox in the human body, your crop is smallpox. Sow there scarlatina, and your crop is scarlatina. Sow typhoid virus, your crop is typhoid—cholera, your crop is cholera. The disease bears as constant a relation to its contagium as the microscopic organisms just enumerated do to their germs, or indeed as a thistle does to its seed.
— John Tyndall
In 'Fermentation, and its Bearings on Surgery and Medicine', Essays on the Floating­Matter of the Air in Relation to Putrefaction and Infection (1881), 264.
Science quotes on:  |  All (4107)  |  Alone (312)  |  Appropriate (61)  |  Avoid (116)  |  Bacteria (48)  |  Bear (159)  |  Body (537)  |  Change (595)  |  Cholera (6)  |  Constant (144)  |  Crop (25)  |  Cultivation (35)  |  Disease (332)  |  Do (1908)  |  Effect (394)  |  Enabled (3)  |  Enumerated (3)  |  Error (321)  |  Ferment (5)  |  Germ (53)  |  Grow (238)  |  Growth (188)  |  Human (1470)  |  Human Body (34)  |  Indeed (323)  |  Individual (404)  |  Isolation (31)  |  Liquid (50)  |  Microscopic (26)  |  Multiply (37)  |  Observation (560)  |  Observed (149)  |  Organism (220)  |  Other (2236)  |  Particular (76)  |  Louis Pasteur (81)  |  Penicillium (3)  |  Purity (14)  |  Remain (349)  |  Research (677)  |  Scarlet Fever (2)  |  Seed (93)  |  Smallpox (14)  |  State (491)  |  Subsequent (33)  |  Teaching (188)  |  Thistle (5)  |  Typhoid (7)  |  Virus (27)  |  Word (622)

Every occurrence in Nature is preceded by other occurrences which are its causes, and succeeded by others which are its effects. The human mind is not satisfied with observing and studying any natural occurrence alone, but takes pleasure in connecting every natural fact with what has gone before it, and with what is to come after it.
— John Tyndall
In Forms of Water in Clouds and Rivers, Ice and Glaciers (1872), 1.
Science quotes on:  |  Alone (312)  |  Before (8)  |  Cause (542)  |  Connection (162)  |  Effect (394)  |  Fact (1212)  |  Human (1470)  |  Human Mind (128)  |  Mind (1339)  |  Natural (796)  |  Nature (1928)  |  Observation (560)  |  Occurrence (53)  |  Other (2236)  |  Pleasure (179)  |  Preceding (8)  |  Satisfaction (74)  |  Study (656)  |  Studying (70)  |  Succeed (109)  |  Succeeding (14)

With accurate experiment and observation to work upon, imagination becomes the architect of physical theory.
— John Tyndall
In discourse delivered before the British Association at Liverpool (16 Sep 1870), 'Scientific Use of the Imagination', collected in Fragments of Science: a Series of Detached Essays, Addresses and Reviews (1892), Vol. 2, 104.
Science quotes on:  |  Accuracy (78)  |  Accurate (87)  |  Architect (30)  |  Become (815)  |  Experiment (696)  |  Imagination (328)  |  Observation (560)  |  Physical (508)  |  Physical Science (101)  |  Scientific Method (176)  |  Theory (972)  |  Work (1351)

[Louis Rendu, Bishop of Annecy] collects observations, makes experiments, and tries to obtain numerical results; always taking care, however, so to state his premises and qualify his conclusions that nobody shall be led to ascribe to his numbers a greater accuracy than they merit. It is impossible to read his work, and not feel that he was a man of essentially truthful mind and that science missed an ornament when he was appropriated by the Church.
— John Tyndall
In The Glaciers of the Alps (1860), 299.
Science quotes on:  |  Accuracy (78)  |  Appropriation (5)  |  Ascribe (17)  |  Care (186)  |  Church (57)  |  Collection (64)  |  Conclusion (255)  |  Essential (200)  |  Experiment (696)  |  Feel (366)  |  Greater (288)  |  Impossibility (60)  |  Impossible (253)  |  Man (2249)  |  Measurement (174)  |  Merit (50)  |  Mind (1339)  |  Miss (51)  |  Nobody (104)  |  Number (701)  |  Numerical (39)  |  Observation (560)  |  Obtain (163)  |  Ornament (20)  |  Premise (37)  |  Qualification (14)  |  Read (288)  |  Louis le Chanoine Rendu (2)  |  Result (678)  |  Science (3880)  |  Science And Religion (310)  |  State (491)  |  Statement (142)  |  Truth (1062)  |  Work (1351)


See also:
  • 2 Aug - short biography, births, deaths and events on date of Tyndall's birth.
  • John Tyndall - context of quote “Fatal…to blink facts” - Medium image (500 x 250 px)
  • John Tyndall - context of quote “Fatal…to blink facts” - Large image (800 x 400 px)
  • John Tyndall - context of quote “The First Experiment a Child Makes” - Medium image (500 x 250 px)
  • John Tyndall - context of quote “The First Experiment a Child Makes” - Large image (800 x 400 px)
  • On Matter and Force - John Tyndall’s Lecture to general public at Dublin (1867).
  • A Vision of Modern Science: John Tyndall and the Role of the Scientist in Victorian Culture, by Ursula DeYoung. - book suggestion.

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.