American carpenter and builder, august 1906 (1906)
American Carpenter and Builder Co. · American Carpenter and Builder Co. · leaf 97
s. Reducescost of plant and cost of operation. Every one knowsthat concrete should not be disturbed after it is moldedor while it is setting, but this is the only machine by which this is possible. The blocks cost6 cents to make—sell for 18 cents. One man can make 200 blocks per day. Whole…
Rough carpentry · Architecture · Designs and plans
Internet Archive · Building Technology Heritage Library · Public Domain Mark 1.0. Free to use for anything.
