Trebel, George. [from old catalog] · New York, F. Tousey · leaf 55
ade to rest inthe arm-holes of the vest. The light should not be burnedcontinuously, but flashed only at intervals; neither should ^theelements be allowed to remain in the solution when the bat-tery is not in use, a« they would soon be eaten up by the fluid.The entire cost of this battery and… … A molding case of brass, in the shape of a shallow pan, is filledto the depth of about one centimeter with melted wax. A fewpages are set up in common type, and an impression taken bypressing them into the wax. The types are then distributed, and again used to set up otherpages. Powdered plumbago…
Electricity
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
