ast Steel. Hardened; THE PHONOGRAPH.—A DETAILED Ground, and Burnished, from Ww. Le DOUGLAS 3-16in. to 2 in. diameter. THE descriptton of the new and improved form of the pho- In quality and density of metal, nograph just brought out by Edison. With 8 engrav- Hin uniformity of temper, und in ac-… … all the prinzipal departments of Science and the office and from all newsdealers. 16, 18 & 20 Cortlandt St., N. Y. City. Useful Arts, embracing Biology, Geclogy, Mineralogy, Natural History Geography, Archeology. Astronomy, ESTABLISHED HALF A ora. Chemistry, Electricity, Light. Heat, Mechanical…
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