ROWLAND, Henry Augustus (1848-1901). On the mechanical equivalent of heat, with subsidiary researches on the variation of the mercurial from the air thermometer, and on the variation of the specific heat of water. Reprint from Proceedings of the American Academy of Arts & Sciences, 15; new series 7 (1879-1880), pp. 75-200. Cambridge: University Press, 1880. 8o (234 x 146 mm). Text diagrams, wood-engraved frontispiece. Contemporary half brown morocco, gilt-lettered spine, marbled boards (worn, joints starting). Provenance: Henry A. Rowland, the author (bookplate & annotations); John Hopkins University Library (bookplate, perforated stamp on title & other leaves, deaccession stamp). FIRST EDITION, OFFPRINT ISSUE FOR ENGLISH DISTRIBUTION, with cancel title and English imprint. Rowland was John Hopkins University's first professor of Physics, and was instrumental in creating what was then the best university physics department in the US. "The present work contains Rowland's redetermination of the mechanical equivalent of heat, along with his demonstration that the specific heat of water varies with temperature" (Norman 1853). [Bound with:] -- ROWLAND. Appendix to paper on the mechanical equivalent of heat, containing the comparison with Dr. Joule's thermometer. Reprint from Proceedings of the American Academy of Arts and Sciences 16 (1881), pp. 38-45. [N.p, n.d.]. 8o. Norman 1853.