Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity (1854)
Davis, Daniel · Boston : Palmer and Hall · leaf 56
The wires pass up through abrass piece which screws into the barrel, they beingcompletely insulated from each other. A sectional Fig. 27. view of this partis annexed. Thefine platinum v\drestretches across be-tween the two.The introductionof a proper quan-tity of hydrogengas may be eflectedin the… … 40 DAVISS MANUAL. piece unscrewed, immerse the muzzle in the jar tosuch a depth that the water may fill one quarter ofthe barrel. Then replace the brass piece, and, bring-ing the muzzle over the end of the tube, open thestop-cock of the reservoir. When the escape ofbubbles shows the pistol to be…
