e and labors of this eminent engineer. With a tricity. fc'or electrical plates, and as a non-conductor of elec- against high prices and inferior goods. If a dealer portrait. Contained in Sci entific American Supple- cells, etc., it is unsurpassed. nngs, washers, accumulator ' offers W. L. Douglas… … In quality and density of metal, nograph just brought out by Edison. With 8 engrav- W. L. DOUGLAS in uniformity of temper, und in ac- ^tuntxiit ^mtxitm ings. Contained in Scientific American Supple- curacy and nicety of finish warrant- ment, No. 632. Price 10 cents. To be had at this ed unequaled.…
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