The flame of sulphur and nitre contains a red ray which appears to me of a remarkable nature. This red ray appears to possess a definite refrangibility, and to be characteristic of the salts of potash, as the yellow ray is of the salts of soda, although,... Spectrum Analysis: Six Lectures, Delivered in 1868, Before the Society of ... - Page 127 by Henry Enfield Roscoe - 1873 - 484 pages Full view -
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