w traverses a dial on the inclosing bex of ^ < t > »' the apparatus. It is merely necessary to set the needle to the A NEW-ELECTBIC T'IBE ALABU AIO) BELL F1TLL. graduation in the dial corresponding to the degree of heat The annexed engraving (which we select from Les Mondea), at which an alarm is… … honey, etc., and bichromate of potash, and to dust this hygro- scopic picture with red lead powder. The red lead image is Patented through the Scientific American Patent Agency, which may ordinarily be employed in lieu of the common then burnt in; and the more soluble lead glass thus obtained,…
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