Channing, William F.(William Francis),1820-1901 · Boston : Thomas Hall · leaf 243
forceps except the inside of itsjaws, where they grasp the tooth. 374. As it is not desirable that the electro-magnetic shocks should pass until the forceps is ad-justed on the tooth, a key (Fig. 21) is interposedbetween the electro-magnetic apparatusand the handle heldby the patient.… … PAINLESS SURGERY 235 Fig. 22. the foot, it may be made like a pedal. The key-may also be made with a spring and catch, whichlast is disengaged by a slight motion of the oper-ator, and which then closes the circuit permanentlyuntil the tooth is extracted. 375. As the sulphate ofcopper battery, shown…
Electrotherapy · Medicine, Physical · Electricity
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