Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary (1917)
Hiscox, Gardner Dexter, 1822?-1908 · New York : The Norman W. Henley publishing co. · leaf 29
23. Rolling weight by horizontal push. P = WX>^ w = PX^h 22 THE MECHANICAI. POWERS. … Strain 24. THK WEDGE. Strain = force of blow X / w /, length of wedge.Wf width of wedge.
Mechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.