%. 212 Broadway, New York. Steam Fitters’ & Plumbers’ Supplies. ars ICROSCOPES, OPERA GLASSES, SPY paper is published weekly. Every number contains six- Glasses, Spectacles, cn Barome- | ters, Compasses. R. teen pages ot useful information, and a large number of Manufacturing Opticians,… … H.W. JOHNS M'F'G CO. 87 MAIDEN LANE, N.Y. both ScIENTIFIC AMERICAN and SUPPILEMENT for 1 OGANDUS’ PATENT UNIVERSAL ECCEN- year. Thisincludes postage, which we pay. Remit by a2 Week in vourowntown Terms and $5 outfit $66 TRIC MILLS—For grinding Bones, Ores, Sand, Old Crucibles, Fire Clay, Guanos,…
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