Channing, William F.(William Francis),1820-1901 · Boston : Thomas Hall · leaf 282
Fig, 53. No. 53. Galvanometers, for testing various galvaniccurrents. Price, $10.00 to $35.00. No. 54. Vertical Calvanometer, in case, for office use.Price, $15.00. OF ELECTRO-MEDICAL INSTRUMENTS. 25 … Tig. 58. No. 55. Halls Patent Constant Battery for ExtractingTeeth without pain. Represents the instrument completein box. Price, $12.00.3 2G halls catalogue No. 56. The forceps, and manner of connecting themwith the footboard and handles. No. 57. Halls Improved Footboard. This is a break-current…
Electrotherapy · Medicine, Physical · Electricity
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