. The medical and surgical uses of electricity : including the X-ray, Finsen light, vibratory therapeutics, and high-frequency currents . strument we are enabled not onlyto detect the presence, but to determine the kind, of electricity that mayexist in any body. i6 ELECTRO-PHYSICS. Fig. 12 represents Bennetts electroscope. j9 is a tubulated glassshade, enclosed at its lower end by a metallic cover, by means of whichit communicates with the ground. A metal rod, fitting in the tubule ofthe shade, terminates at its upper extremity in a knob (C), and at its lowerextremity it holds two narrow strip
. The medical and surgical uses of electricity : including the X-ray, Finsen light, vibratory therapeutics, and high-frequency currents . strument we are enabled not onlyto detect the presence, but to determine the kind, of electricity that mayexist in any body. i6 ELECTRO-PHYSICS. Fig. 12 represents Bennetts electroscope. j9 is a tubulated glassshade, enclosed at its lower end by a metallic cover, by means of whichit communicates with the ground. A metal rod, fitting in the tubule ofthe shade, terminates at its upper extremity in a knob (C), and at its lowerextremity it holds two narrow strips of gold leaf. On the inside of theshade are two strips of gold leaf reaching to the metal cover. If a bodycharged with either kind of electricity is brought in contact with the knob,the gold leaves diverge. Thomson^s Qiiadrant Electrometer.—This instrument is quite complex,but far superior for all delicate researches. It is an electrometer in which the electrostatic charge is measured bythe attractive force of plates or quadrants, on a light needle of aluminumsuspended within them. The sectors or quadrants are of brass, and are.
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Keywords: ., bookauthorrockwell, bookcentury1900, bookdecade1900, bookyear1903
