Don Mills, Ont. : Southam-MacLean Publications · leaf 191
ow was the pit sawyer, the man abovethe top sawyer. The first sawmill was built on the same principle—onlythat the saw worked up and down by power. Then severalsaws were worked together in a gang. The next step wasthe use of the circular saw. Just when it was invented, orwhere, is uncertain. The… … Fig. 2. on special order. The mandrel hole was square. The platewas not always solid, sometimes having a toothed rim andspokes like a wheel. For power, at first water was used,then steam. In some western States they were driven byhorses walking around. In L839 the inserted tooth was in-vented,…
Furniture industry and trade · Woodworking industries
Internet Archive · Thomas Fisher Rare Book Library · Public Domain Mark 1.0. Free to use for anything.
