hyponitric

Updated: May 2, 2025

Absorption Spectra. The ordinary form of comparison spectrum cannot be employed on account of the absence of a slit. The most promising method of determining the wave lengths of the stellar spectra is to interpose some absorbent medium. Experiments are in progress with hyponitric fumes and other substances.

Various - Scientific American Supplement, No. 601, July 9, 1887