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 185
=±t^^B=^;v \A … Fig. 239. the block is retained by the screws ooo j in the figure there are two screwson one side and one on the other; often four are used, two on each side,but most frequently but one on eacb side. PROJECTIONS OF A STANDAHD. PL XY.—The standard is simply a modification of the pillow-block,being…
