Journal of the Association of Engineering Societies (1881)
Association of Engineering Societies (U.S.) · New York, [etc.] Board of Managers · leaf 400
cement and screened gravel, mixed in Ransom machines. These mixers were first located out- side of the tunnel por- tals and delivered the concrete to 0.5 yd. 24-in. gage steel side -dump cars, from which it was dumped on each side of the track under the cen- tering. After the work had advanced…
Engineering
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
