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 184
shaft and wheel; by thesescrews the wheel can be raised or lowered, so as to adjust its position accu-rately ; beneath the box will be seen a movable collar, to adjust the lateralposition of shafts. Figs. 236, 237 are the plan and elevation for the stej?^ or rather guide(as it bears no weight), of… … n A Fi?. 236. Fig. 237. justment by the three sets of set-screws. Wooden steps are often used tosupport the shafts of the smaller horizontal wheels beneath the surface ofthe water ; the fibres of the wood are placed vertically, and afford a veryexcellent bearing surface. When cast iron or steel is…
