Atlas of Emission Spectra of most of the Elements

Abstract

THIS atlas comprises the results of an investigation of the spark, arc, and flame spectra of most of the chemical elements. Twenty-eight charts are given showing heliographic reproductions of photographs taken with the aid of two small Rowland concave gratings, each of 1 metre radius and 20,000 lines to the inch. One of the gratings had a ruled space 9 cm. broad, and was used chiefly for the region of shorter wave-length. The other had a breadth of 5 cm., and was used to photograph the less refrangible portion of the spectrum. For each group of metals two charts are given, one showing the normally visual part of the spectrum, the other the violet and ultra-violet region. The dispersion given by the gratings is such that the length of spectrum from the K line of calcium (λ 3934) to the D lines of sodium (λ 5893) is about 4.5 inches, or 11 cm., each scale division on the reproductions corresponding to ten tenth-metres. The region of spectrum studied extends from about λ 2500 to λ 7000.

Atlas of Emission Spectra of most of the Elements.

By Drs. Hagenback Konen. English translation by Dr. A. S. King. Pp. v + 70 and plates. (Jena: G. Fischer; London: Wm. Wesley and Sons, 1905.) Price 27s.