Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 150
and e h represent the horizontal thrust on the abutments A and B, but asaf and b e are equal, the force tending to separate them, or to tear asunderAB if a tie-rod, would be represented by either of them. In the application of forces to a lever we have considered them paralleland perpendicular to…
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