Railroad Construction in 1879. Recent Explorations in Afghanistan. The Vlscosimeter. Speaking Dictionary. The Brussels Exhibition. AGRICULTURAL INVENTIONS. The Crops of 1879. Progress of Long Range Telephoning. Aluminum Telegraph Wires., scientific american, 1880-02-11
Railroad Construction in 1879. Recent Explorations in Afghanistan. The Vlscosimeter. Speaking Dictionary. The Brussels Exhibition. AGRICULTURAL INVENTIONS. The Crops of 1879. Progress of Long Range Telephoning. Aluminum Telegraph Wires., scientific american, 1880-02-11
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