Photographic investigation of the absorption spectra of chlorophyll and its derivatives in the violet and ultraviolet region of the spectrum

Abstract

This is well known from the investigations of Soret, Gamgee, and others, hæmoglobin and its coloured derivatives show a characterics absorption band lying between the lines and M of the solar spectrum. The band has been shown to vary in position between narrow limits; in some derivatives it is nearer the red, and in others nearer the violet, end of the spectrum, and is of all the blood absorption bands the most stable.