The spectrum of ammonia

Abstract

A large number of lines in the solar spectrum previously unidentified have been attributed to ammonia by Fowler and Gregory. Their investigation however, referred only to the characteristic ultra-violet band with its centre at about λ 3360, and it seemed desirable to continue the inquiry, in order to determine whether other bands associated with ammonia are also represented in the solar spectrum. One of the bands, in the yellow-green part of the spectrum, about λ 5635, was first observed in vacuum tubes by Schuster, and has since been found to consist of two adjacent bands. Besides this, there is an extended band spectrum ranging through the greater part of the visible region, which appears in the greater part of the visible region, which appears in the flame in the flame of ammonia burning in oxygen, and has been called the "α-band" by Eder and Valenta.