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Marc Antoine Augustin Gaudin
(5 Apr 1804 - 2 Apr 1880)
French crystallographer and chemist who contributed to the early chemistry of photography by introducing potassium cyanide as a fixing agent which reacted with the silver salts on the light-sensitive plate surface to form soluble silver cyanide which could be washed away water. He published his method in La Lumière on 23 Apr 1853. The following year, in the same journal he published what are regarded as the first experiments with collodion dry plates on 22 Apr and 27 May 1854. In 1873, he grew the first synthetic ruby crystal.
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Science Quotes by Marc Antoine Augustin Gaudin (1 quote)
For us, an atom shall be a small, spherical, homogeneous body or an essentially indivisible, material point, whereas a molecule shall be a separate group of atoms in any number and of any nature.
— Marc Antoine Augustin Gaudin
Annales de Chimie 1833, 52, 133. Trans. W. H. Brock.
See also:
- 5 Apr - short biography, births, deaths and events on date of Gaudin's birth.
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) -- 
