Seventy-fifth Anniversary of Franklin Institute. The Current Supplement. RECENTLY PATENTED INVENTIONS. Agricultural Implements. Bicycle-Appliances. Electrical Devices. Engineering Improvements. Mechanical Devices. Railway-Appliances. Miscellaneous Inventions., scientific american, 1899-02-11
Seventy-fifth Anniversary of Franklin Institute. The Current Supplement. RECENTLY PATENTED INVENTIONS. Agricultural Implements. Bicycle-Appliances. Electrical Devices. Engineering Improvements. Mechanical Devices. Railway-Appliances. Miscellaneous Inventions., scientific american, 1899-02-11
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