MUNN ifc CO.,3Kl Bi'oadtvny, New York. MENT. Any desired back number of the Scientific years'continuous experience. Any This Company owns the Letters Patent American Supplement can be had at this office for one may quickly ascertain, free, 10 cents. Also to be had of newsdealers in all parts of… … Letters Patent No. 474,231, granted to In the Bureau of Construct ion and Repair, U.S. Navy, iHade easy and interesting with the help of bur new tbe Comptometer is used for 95per cent, of all arithmeti- Thomas A. Edison, May 3, 1892, for a Celestial Planisphere and Handbook. cal work. Assures…
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