MECHANICAL INVENTIONS. Researches on Batteries. Improvement of the Bunsen Battery. The Exportation of Apples. AMERICAN RAZORS. ' CREMATION OF THE DEAD. Pneumatic Tubes supersede Cash Boys. The Factory Laws in Switzerland. TIN PLATE INDUSTRYTHE PROCESS OF MANUFACTURE., scientific american, 1880-10-11
MECHANICAL INVENTIONS. Researches on Batteries. Improvement of the Bunsen Battery. The Exportation of Apples. AMERICAN RAZORS. ' CREMATION OF THE DEAD. Pneumatic Tubes supersede Cash Boys. The Factory Laws in Switzerland. TIN PLATE INDUSTRYTHE PROCESS OF MANUFACTURE., scientific american, 1880-10-11
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