Inside Out Library · Explore

Scientific American, Vol. 91, No. 12 (1904) (1904)

leaf 4

An illustration from Scientific American, Vol. 91, No. 12 (1904), 1904, leaf 4
d telephony with which per hour, which require at times, approximately, 2,500 The Key route has twenty-six of these trolleys in also the press has for some time been occupying itself. to 3,000 amperes to be collected from the overhead con- use, and one other road has arranged to install fourteen.… … ter is a simpler appa- The device is prac- ratus than the preced- tically noiseless when ing, and, since it ope- operating at any speed, rates by means of a mag- owing to the fact that the roller is packed neto, it may prove very To Secure Fulton's Birthplace. useful te the army as well as in the…

Internet Archive · Public domain (published before 1931). Free to use for anything.

More pictures from Scientific American, Vol. 91, No. 12 (1904)

More like this