Fig. 1. Fi<r. 1. —\. The Roller, consisting of seven distinct cylindrical wheels withspokes and boxes, and fitting close to each other at the edge. They are ofcast-iron ; five feet in diameter, and four feet wide ; and neigh three tons. Fig. 2.— B. Wrought-iron axle, engine-turned ; three inches…
Civil engineering · Architecture
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
