SCIENTIFIC AMERICAN. 389 Poor Inventors. Massachusetts Charitable Hechanics As. sociation. The Half Ounce Letter. HE CHANIvAL MOVEMENTS. Vibrating Water Trough. Pace Wheel. Cement in Masonry. Humble Life. The Steam Engine. Boston Enterprise. SCIENTIFIC AMERICAN. Mental Toll and Rental Science. 'Gold tinning. Canton to Boston. Brooklyn Heights. To New Subscribers., 1847-08-28
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