Light energy, its physics, physiological action and therapeutic applications (1904)
Cleaves, Margaret Abigail, 1848-1917 · New York, Rebman company;[etc., etc.] · leaf 154
-?«nJ -240 PHOTOMETRIC CURVES.FOR EQUAL TOTAL AMOUNTS OF LIGHT A—Sun-light.B— Fire-fly light. Abscissae—Wave Lengths.Ordinates—Luminous Intensities. … B. Fire-fly Spectmint. Fig- 3- THE PHYSICS Of LIGHT ENERGY. 12<j agent only, illustrating at the same time the luminous effi-ciency of the firefly spectrum. But as these pages endeavorto show, the sun shines not simply for the purpose of illumi-nating the darkness, but that life from the…
