Solar Spectrum, and Spectra of the Alkanes and Alkaline Earths.
Copied from the Original Drawings of G. Kirchhoff and R. Bunsen.
Every element, metallic or otherwise, when converted into a luminous gas, produces lines which are always found in the same part of the spectrum, and are therefore unalterable in position. The instrument ([Fig. 1]) is called the Spectroscope.
Fig. 1.—THE AMATEUR’S SPECTROSCOPE.
A, Tube with knife edges; B, the prism; C, the telescope; D, the lamp, supplied with gas by pipe E; F, stand carrying the platinum wire. The wire may be held in the hand, but is more convenient when attached to a stand.
The instrument ([Fig. 2]) will exhibit the dark fixed lines in the solar spectrum, and also the bright lines in the spectra of incandescent metals.
