Free. verting bar iron into steel and then melting it in clay $1.60 six months. Specimen copies free. Remit by pots to form Ingots of cast steel. Contained in Scien- H. W, JOHNS M'F'G CO., 87 MAIDEN LANE, N. Y. Postal Order or Check. TIFEC AMEiMCAN SUPPLEMENT, No. 464. Price 10 X'OSI'X'I'VES… … ita Oliver Street, Boston, Mass. cation of the Scientific American, continue to ex- and described in the Supplement. amine improvements, and to act as Solicitors of Patents Price for the SupPLKMKNTfor the United States and for Inventors. s>CARy&M:OEN:(«) Canada, $5.00 a year, or one copy of the…
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