Light energy, its physics, physiological action and therapeutic applications (1904)
Cleaves, Margaret Abigail, 1848-1917 · New York, Rebman company;[etc., etc.] · leaf 508
f which the divergent rays of anelectric arc are collected into parallel rays. These parallelrays are then collected into a cone, the apex of which is aQuoted by Freund. CONCENTRATED ELECTRIC ARC LIGHT ENERGY. 467 allowed to fall upon the part of the skin to be treated.Fig. 16 gives a diagrammatic… … -Finsen Apparatus.1 two plano-convex lenses of quartz. These two parts of theapparatus may be separated by a rack and pinion movement.The various lenses are so proportioned as to size that 1 and 2have together a focal distance of 12 cm., while 3 and 4 havea focal distance of 10 cm. By the lenses 1…
