Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 613
ectiles of great mass with low velocity. Until very recently allEnglish investigations have been upon punching projectiles and wrought-iron armor. The introduc-tion of st«el plating, and the disintegrating effects upon it of heavy projectiles, have again broughtthe racking system into prominence.… … the total energy in the projectile at the moment of impact. This is given in the formula 2*7 which W= weight of projectile, V= final velocity, and g = gravity (32.2 ft.). The punching effects PULLEYS. 585 8486. of projectiles are usually compared by calculating what is termed the energy per inch of…
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