Transactions of the American Philosophical Society -- HENRY. "Contributions to Electicity and Magnetism." Extracted from: Transactions of the American Philosophical Society(?). N.p., n.d. (read November 2, 1838). 4to, disbound, some spotting. PRESENTATION COPY, inscribed by Henry to James H. Coffin on the first page of the article. (2)" /> HENRY, JOSEPH. Contributions to Electricity and Magnetism. Phildelphia, 1839. <I>4to, disbound; dampstained.</I> PRESENTATION COPY, inscribed by Henry on the title-page: "To the Rev. Professor Hitchcock with the respects of the author." Offprint from: <I>Transactions of the American Philosophical Society</I> -- HENRY. "Contributions to Electicity and Magnetism." Extracted from: <I>Transactions of the American Philosophical Society</I>(?). N.p., n.d. (read November 2, 1838). <I>4to, disbound, some spotting.</I> PRESENTATION COPY, inscribed by Henry to James H. Coffin on the first page of the article. (2) | Christie's