An international system of electro-therapeutics : for students, general practitioners, and specialists . ^ yard-measure. It is pulled out to any length as required, andwhen the needed resistance is obtained is held at that point. As the GALVANISM. A-305 battery falls off, it can be released and rolled up automatically either allat once or gradually. As is well known, the usual cautery knife requires a considerablevolume of current to keep it at white heat—say, 15 or 20 amperes. Ofcourse, in practice the cautery knife is used only a few seconds at a time ;the battery therefore would have, with
An international system of electro-therapeutics : for students, general practitioners, and specialists . ^ yard-measure. It is pulled out to any length as required, andwhen the needed resistance is obtained is held at that point. As the GALVANISM. A-305 battery falls off, it can be released and rolled up automatically either allat once or gradually. As is well known, the usual cautery knife requires a considerablevolume of current to keep it at white heat—say, 15 or 20 amperes. Ofcourse, in practice the cautery knife is used only a few seconds at a time ;the battery therefore would have, with a single charge, a very long , if for any reason it should become necessary to use the knife for anextended period, it may be kept at white heat for eiglit hours with a. Fig. 99.—MclNTOSH Poktable Galvano-cautery. single charge, and there will be sufficient current to maintain the ordi-nary snare at proper heat for many hours. The Mcintosh galvanic cautery is also much in use by many prac-titioners. This battery is designed expressly for cautery work. It isinclosed in a polished black-walnut case eight and one-half inches long,eight and one-half inches wide, and ten and one-half inches high, andweighs twenty-one pounds. The elements are composed of zinc andplatinum, fastened upon a hard-rubber base. They are constructed so asto furnish a very large surface in the smallest possible space, therebylessening the resistance and increasing the power of the battery. The A-306 BLEYER. cells and drip-cups are made of hard rubber. The base and elements canbe fastened at any height by a spring-bolt that slips into slots in a cen-tral upright metallic tube; by this means the current can be graduatedto any required intensity. This battery is verj^ compact, porta
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectuterus, bookyear1894
