ENGINEERING INVENTIONS. 464 1 IMPROVED POCKET KNIFE. IMPROVED POCKET KNIFE. IMPROVED BOOK REST. On Sulphurous Acid Considered as an Oxidizing Agent. BY MR. ANTONY GUYARD (HUGO TAMM). CENTRIFUGAL EXTRACTOR FOR CANE MICE. BURGESS' CENTRIFUGAL EXTRACTOR., scientific american, 1881-11-19
ENGINEERING INVENTIONS. 464 1 IMPROVED POCKET KNIFE. IMPROVED POCKET KNIFE. IMPROVED BOOK REST. On Sulphurous Acid Considered as an Oxidizing Agent. BY MR. ANTONY GUYARD (HUGO TAMM). CENTRIFUGAL EXTRACTOR FOR CANE MICE. BURGESS' CENTRIFUGAL EXTRACTOR., scientific american, 1881-11-19
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