city. Kor electrical plates, the life and labors of this eminent engineer. Witha and as a non-conductor of elec- a atast high” prices and inferior goods. If a dealer portrait. Contained in Sct ENTIFIC AMERICAN SUPPLE- cells, etc., it is unsurpassed. Tings, washers, accumulator ° ers W. L. Douglas… … In quality and density of metal, nograph just brought out by Edison. With 8 engrav- Hin uniformity of temper, und in ac- Scientific American ings. Contained in SCIENTIFIC AMERICAN SUPPLE- yi curacy and nicety of finish warrant- MENT, No. 632. Price 10 cents. 11'0 be had at this ed unequaled. office…
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