Light energy, its physics, physiological action and therapeutic applications (1904)
Cleaves, Margaret Abigail, 1848-1917 · New York, Rebman company;[etc., etc.] · leaf 111
hat it can only be observed throughsmoked or densely colored glass. Upon examination inthis way, the observer notes that the arc or bow-shapedbluish flame which appears in the gap between the two op-posed carbons is very much less brilliant than the ends ofthe carbons themselves. The characteristic… … Fig. i.—Carbons used in clinical work with a 25-ampere arc.The upper or positive carbon shows the crater-like depression, thelower or negative carbon the nipple-like projection. The area of in-candescence is clearly shown as well as the disintegrating actionupon the carbons under the double…
