RECENTLY PATENTED INVENTIONS. Engineering. Agricultural. Miscellaneous. NEW BOOKS AND PUBLICATIONS. HINTS TO CORRESPONDENTS. Enquiries to be Answered. used?-P. E. W., scientific american, 1889-01-05

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RECENTLY PATENTED INVENTIONS. Engineering. Agricultural. Miscellaneous. NEW BOOKS AND PUBLICATIONS. HINTS TO CORRESPONDENTS. Enquiries to be Answered. used?-P. E. W., scientific american, 1889-01-05

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