David Brooks offers Philadelphia underground system

[Trade Journal]

Publication: The Electrical Engineer

New York, NY, United States
vol. 11, no. 144, p. 140, col. 2

MR. DAVID BROOKS has offered to the city of Philadelphia the free use of his underground system, with which, he claims, a 3-inch pipe carrying 500 conductors can be laid at a cost of $1,600 per mile.

Keywords:	David Brooks
Researcher notes:
Supplemental information:
Researcher:	Bob Stahr
Date completed:	January 25, 2011 by: Elton Gish;