...insisted "that an extensive course of experiments should be made on the spectra of chemical flames," as "the definite rays emitted by certain substances —...all bodies combine, according to the atomic theory." In the same paper Mr. Talbot describes also the spectra of gold, silver, zinc, and copper leaves "...

...substance is produced by this cause acting more energetically at a high temperature. On Prismatic Spectra. It is much to be desired that an extensive course...I formerly made upon this subject will be found in Brewster's Journal for 1826*. In addition to the substances there enumerated as giving a peculiar optical...

...having to do with atoms or molecules. As early as 1836, the British spectroscopist Talbot had written: "The definite rays emitted by certain substances,...yellow rays of the salts of soda, possess a fixed and inviolable character, which is analogous in some measures to the fixed proportion in which all bodies...

...of the salts of soda, possess a fixed and invariable character, which is analogous in some measures to the fixed proportion in which all bodies combine...conducted, may throw some additional light upon chemistry.' Fox Talbot's program was hindered for the next 25 years by the fact that the double D line in the yellow...

...spectra of chemical flames, accompanied with accurate measurements of the bright and dark lines. . . The definite rays emitted by certain substances as,...and invariable character, which is analogous in some measures to the fixed proportion in which all bodies combine according to the atomic theory. It may...