First edition of A New System of Chemical Philosophy by John Dalton, 1808. Plate 4. contains the arbitrary marks or signs chosen to represent several chemical elements, from simple elements such as hydrogen, carbon, and oxygen, to septenary elements such as an atom of sugar. A New System of Chemical Philosophy was a milestone work in the history of chemistry, in which Dalton announced his revolutionary atomic theory and laws of definite and multiple proportions and laid the foundation for the advancement of chemistry in the 19th century. (cropped and cleaned)
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