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 260
1-^ 5i 21-J 2J 3 m n 5 2f 3 3 5? The thickness of the nut should be equal to the diameter of the bolt.The head of the bolt is usually square ; the nut may be of the same form,but as often is six-paned or six square. When the head of the bolt is in- … Fig. 2S0.
