Electrical news and engineering . n elongation of .33 per cent. On account ofthese properties the metal is peculiarly adapted for use asa trolly wire support. Examinations of extruded ears that have been in usefor several months under a two-minute car service showedthat the lips of these ears were tightly closed around thewire so that it was impossible to detect the actual joint be-tween the lips and the trolley wire; also, the ends of theears were found to grip the wire just as well as the centralportion, instead of curling up as is often the case in cast Tester substitutes a simple electrica
Electrical news and engineering . n elongation of .33 per cent. On account ofthese properties the metal is peculiarly adapted for use asa trolly wire support. Examinations of extruded ears that have been in usefor several months under a two-minute car service showedthat the lips of these ears were tightly closed around thewire so that it was impossible to detect the actual joint be-tween the lips and the trolley wire; also, the ends of theears were found to grip the wire just as well as the centralportion, instead of curling up as is often the case in cast Tester substitutes a simple electrical measurement of con-ductivity for the chemical reactions hitherto used for thepurpose. The working principle of the apparatus is basedupon the fact established by Kohlrausch that the conduc-tivity iif pure water containing any electrfilytic substance insolution i> due almost entirely to the dissolved substanceand only to a negligible extent to the water itself. Kohl-rausch established the law that, provided a solution is very.
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