A text-book of physics
Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed; Carman, Albert Pruden, b. 1861; Lewis, E. Percival (Exum Percival), 1863-1925; McClung, Robert Kenning, 1874-; Mendenhall, Charles E. (Charles Elwood), 1872-1935