AN IMPROVED ROTARY ENGINE. JARVIS' IMPROVED ROTARY ENGINE. all strains and wear equally throughout the engine. Roman Fever. IV 4 Fraudulent Mining Schemes. A NEW BALL BEARING. LUNDE'S BALL BEARING. A COMBINED BOTTLE AND MEASURING DEVICE., scientific american, 1898-05-14


AN IMPROVED ROTARY ENGINE. JARVIS' IMPROVED ROTARY ENGINE. all strains and wear equally throughout the engine. Roman Fever. IV 4 Fraudulent Mining Schemes. A NEW BALL BEARING. LUNDE'S BALL BEARING. A COMBINED BOTTLE AND MEASURING DEVICE., scientific american, 1898-05-14


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