Scientific American. 182 constancy of the electric source (Bunsen and Grove couples), apparatus. The accompanying engrav- in the secondary pile is analogous to … CUMMERFORD’S HEAD PROTECTOR. guished officer has been enabled not piece is used incase it is necessary for the wearer to communicate with only to illuminate the interior of can- the method. Recourse was then had toa circulation of wa- ter to destroy the heat as fast as produced, but this made the…
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