Publications for 06/1872
London Society of Telegraph Engineers, David Brooks elected member
Comparative Tests of Insulators
Lehigh Valley Railroad, uses Brooks insulators
A telegraph in a tunnel, Lehigh and Susquehanna Railroad
A line is being installed between Hazleton & Wilkesbarre, PA with Emminger insulators
L.G. Tillotson is home again
Dan Hemingray kicked by horse
Daniel Carroll Hemingray