. The medical and surgical uses of electricity. . are readily raised and lowered by means of the crank onthe top in the centre. One of the most successful attempts to combine a suitable degree ofstrength with compactness and lightness has, perhaps, been made in thebattery represented by Fig. i8i. It is composed of but two hard-rubbercells, with elements of zinc and carbon—each cell measuring 3^ inches inlength, 2^ inches in width, and will retain a number 19 platinum wire ata white heat for more than a quarter of an hour. The elements are made GALVANO-CAUTERY. 547 to move on small wheels horiz
. The medical and surgical uses of electricity. . are readily raised and lowered by means of the crank onthe top in the centre. One of the most successful attempts to combine a suitable degree ofstrength with compactness and lightness has, perhaps, been made in thebattery represented by Fig. i8i. It is composed of but two hard-rubbercells, with elements of zinc and carbon—each cell measuring 3^ inches inlength, 2^ inches in width, and will retain a number 19 platinum wire ata white heat for more than a quarter of an hour. The elements are made GALVANO-CAUTERY. 547 to move on small wheels horizontally, in their relation to the fluid in thecells. This is a great improvement on the old method of blowing withan air-bulb for the purpose of producing agitation of the fluid, and con-sequent increase of current strength, and seems to us to more thoroughlydisplace the battery fluid than any other method. For very prolongedoperations this little battery is hardly sufficient, and should be replacedby the larger form, consisting of four Fig. i8i.—Galvano-Cautery Apparatus (Kidder). Storage Batteries or Accumulators.—Storage batteries may be chargedeither from primary batteries or from an incandescent lamp circuit. The Vetter current adapter (Fig. 182) furnishes a handy and cleanmethod by which storage batteries can be easily and economically re-charged from the incandescent light circuit and at very little expense. The illustration shows the manner of charging a storage battery withthe constant incandescent currrent by means of the Vetter adapter. A isthe adapter attached to an ordinary electric-light fixture, with a 50-candlepower lamp in the receptacle of the adapter. The charging posts of thebattery are connected with binding posts i and 2 of the adapter by meansof the two conducting cords. The time required to charge the battery by this method depends en- 548 ELECTRO-SURGERY. tirely on the amount of current left in the battery and the capacity of thelamp. A 50
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1896
