A system of electrotherapeutics as taught by the International correspondence schools, Scranton, . Fig, 11 FIG. 12 30. Bottinis Incisor.—A special form of cautery isBottini? incisor, Fig. 12, used for incision of the prostrate §17 PHYSICS OF LIGHT AND CAUTERY 25 gland. The female shaft F contains the cautery knife P, whichmay be moved in or out by turning the wheel H. To keep theshaft cool while the cautery is heated, a stream of cool water iscirculated through the handle G and shaft F by letting thewater pass in through the pipe K and out through the pipe KC is a plug that, inserted in a
A system of electrotherapeutics as taught by the International correspondence schools, Scranton, . Fig, 11 FIG. 12 30. Bottinis Incisor.—A special form of cautery isBottini? incisor, Fig. 12, used for incision of the prostrate §17 PHYSICS OF LIGHT AND CAUTERY 25 gland. The female shaft F contains the cautery knife P, whichmay be moved in or out by turning the wheel H. To keep theshaft cool while the cautery is heated, a stream of cool water iscirculated through the handle G and shaft F by letting thewater pass in through the pipe K and out through the pipe KC is a plug that, inserted in a sleeve, connects it with thecopper conductors. The advantage of the cautery is perhapshere shown at its best. While the shaft is being inserted theblade P is entirely covered and the whole is cold. The currentis sent through the cautery after the desired position has beenfound and the operation performed in about a minute, afterwhich the cautery is again sheathed, the current cut off, and thewhole withdrawn in a cool condition. ELECTRIC LIGHTING INCANDESCENT LAMPS 31. The Filament.—The active
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