Light energy, its physics, physiological action and therapeutic applications (1904)
Cleaves, Margaret Abigail, 1848-1917 · New York, Rebman company;[etc., etc.] · leaf 152
of different sources of light. The author is indebted to thecourtesy of Professor Langley of the Smithsonian Institutefor their use. (See Figs. 2 and 3.) The second plate is introduced as showing the amountof energy wasted in sunlight, when considered as a luminous Four Curves of Equal Areas,… … -?«nJ -240 PHOTOMETRIC CURVES.FOR EQUAL TOTAL AMOUNTS OF LIGHT A—Sun-light.B— Fire-fly light. Abscissae—Wave Lengths.Ordinates—Luminous Intensities.
