A voyage in space; a course of six lectures "adapted to a juvenile auditory" delivered at the Royal Institution at Xmas 1913 (1915)
Turner, Herbert Hall, 1861-1930 · London Society for Promoting Christian Knowledge · leaf 148
source oflight and immediately you see that the yellowbecomes very bright—much brighter than the rest.(See spectrum No. 4, plate facing p. 273). That effectcan be produced by common table salt, which is asalt of sodium; and we know when there is somesodium in the light by this brightening in the… … I27 128 A VOYAGE IN SPACE further the line splits up into two : and with furtherand further progress these lines are so clearly separ-ated that hundreds of other lines can be seenbetween them. We might spend a lifetime examin-ing these lines : but at present I want us to becontent with the very…
Astronomy -- Juvenile literature
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
