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 152
Fig. 212. M Q Q Fis. 213. … the force tending to produce motion, it follows that the body will or willnot move, according as Q M is greater or less ,than M Q, or as the angleP M P^ is greater or less than P M P. The angle P M P is called thelimiting angle of resistance. It depends upon the coefficient of friction,and is…
