Lockyer, Sir Joseph Norman, 1836-1920 · London, Macmillan · leaf 36
OUK PRESENT OBSEBVING POWER. 17 II.] gratings, and one enormous advantage connected with this method is that the resultant spectrum is one of wave-lengths which are, therefore, more easily and accurately determined directly this way than indirectly by means of dispersion by prisms. … FIG. 5. — The eje-end of the Lick telescope with spectroscope attached. G
Helium · Meteoritic hypothesis · Nebulae · Stars · Sun
Internet Archive · Gerstein - University of Toronto · Public domain (published before 1931). Free to use for anything.
