TO CORRESPONDENTS. AMERICAN AND FOREIGN PATENT AGENCY. A. LIST 010 VALUABLE SCIENTIFIC AND MECHANICAL BOOKS Back Volumes Scientific American. Duggan's Work on Bridges. 10DROSSER'S PATENT LAP-WELDED QTEA ENGINES AND BOILERS.--The W OOD'S PATENT SHINGLE NA WOODWORTH'S PATENT PLANING Important Notice to us I AriLOCKS FOR CHURCHES PUBLIC AD A Terms of Advertizing. AriUTTING ENGINE FOR SALE.The Patent Office. Is n a-ri-e, 1850-08-10
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