Light visible and invisible : a series of lectures delivered at the Royal Institution of Great Britain, at Christmas, 1896 (1897)
Thompson, Silvanus Phillips, 1851-1916, Royal Institution of Great Britain · New York : Macmillan · leaf 103
hasbeen lit. It consists of an atmo-spheric gas-burner, into the dimflame of which salt is projected,1making a splendid yellow flamedevoid of every other kind of light.I hold these blue and red stuffs inthe light of the yellow flame. Theone appears simply black, the othera dull gray. A set of… … Fig. 48. 1 The salt is contained in an annular pan at the top of an externaltapering chimney of sheet iron. This annular pan has a gauzebottom, through which on tapping the chimney the salt falls in finepowder into the flame. ii VISIBLE SPECTRUM AND THE EYE 83 the complexion of the human…
Light · X-rays
Internet Archive · UBC Library · Public Domain Mark 1.0. Free to use for anything.
