MUM & COMPANY Editors and Proprietors. Contents: HAND-TOOLINGITS ADVANTAGES TO THE MACHINIST. ECONOMY IN COKE MAKING—THE UTILIZATION OF THE WASTE GASES. The Dental Vulcanite Question. ANTI-FRICTION METAL FOR RAILWAY AXLES. New Facts in Spectrum Analysis., scientific american, 1867-11-30


MUM & COMPANY Editors and Proprietors. Contents: HAND-TOOLINGITS ADVANTAGES TO THE MACHINIST. ECONOMY IN COKE MAKING—THE UTILIZATION OF THE WASTE GASES. The Dental Vulcanite Question. ANTI-FRICTION METAL FOR RAILWAY AXLES. New Facts in Spectrum Analysis., scientific american, 1867-11-30


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