Physical description

Book, titled, "Notes on Bonding and Return Circuits" consisting of 20 pages, printed in black ink. Prepared by The Electric Railway Improvement Co. of Cleveland, Ohio, USA. Gives costs of welding, bonding, rail resistance, voltage drops, testing methods, electrolysis, rail expansion, rail section, sleeper track, treatment of ties (sleepers), and the monthly average price of copper from period 1885 to Dec. 1915, the power required for electric traction and a list of clients.



Date of printing not given in document, estimated to be c1916. See also item Reg. No. 1638 for a book on equipment for welding and bonding.