ncrete masonry fol- oughly grounded to a copper plate buried beneath the hole in the conduit line, and are arranged along the lows exactly the scheme used in building these ancient foundation, and connected to one of the anchor bolts wall running through switches and through the choke walls of… … trestle, how- by the arresters at various times and places, no dam- Stringing a Transmission Cable at the Jamaica Bay Trestle. ever, this age is known to have resulted to the cables. The overhead line construction is of a very substan- method could POWER TRANSMISSION LINE OF THE LONG ISLAND…
San · Earthquake · Apparatus · Motor · Concrete · Scientific American · Construction · American supplements · South bend · San Francisco · Portland cement · American supplement · Motor car · White dental · American june · Reinforced concrete
Internet Archive · Public domain (published before 1931). Free to use for anything.
