Keywords: H.W.Sullivan Galavanometer London.jpg Galvanometer by H W Sullivan London late 19th or early 20th century This galvanometer was used at the transatlantic cable station at Halifax Nova Scotia Canada en wikipedia 2010-12-20 Williamgelbart wikipedia en Williamgelbart wikipedia en Cc-zero Original upload log en wikipedia Wdwd CommonsHelper en wikipedia H W Sullivan+Galavanometer+London jpg 2010-12-20 02 11 Williamgelbart 850×1119× 388429 bytes <nowiki>Galvanometer by H W Sullivan London late 19th century This galvanometer was used at the transatlantic cable station in Halifax Nova Scotia Canada </nowiki> Galvanometers |