Electrical news and engineering . these specialties have the simplest mechanism ever used inelectric switches or sockets and that the action is unusual-ly snappy and positive. The company have also recentlyadded to their line a new battery switch for autoinobile work,canopy switches for bracket and use, and a feed-through switch. Accurate Watt-Hour Meters The curve shown herewith indicates very clearly thehigh degree of accuracy now being obtained by some ofthe best meter manufacturers. This particular curve shows ERRORIN % ?7^ Curve of Tests on CHAMBERUIN & HOOKHAM WAH HOUR METE
Electrical news and engineering . these specialties have the simplest mechanism ever used inelectric switches or sockets and that the action is unusual-ly snappy and positive. The company have also recentlyadded to their line a new battery switch for autoinobile work,canopy switches for bracket and use, and a feed-through switch. Accurate Watt-Hour Meters The curve shown herewith indicates very clearly thehigh degree of accuracy now being obtained by some ofthe best meter manufacturers. This particular curve shows ERRORIN % ?7^ Curve of Tests on CHAMBERUIN & HOOKHAM WAH HOUR VOLT3 100 150 200 250 Curve taken with Constant load of 500 wattson 5 ampere. 200 volt. 50~ meter the r^?^ults of on a Chamberlain & Mookham watt-hour meter, indicating that a variation in voltage all theway from 100 volts to 2jO volts was only attended by a\.2 i)er cent, variation in the accuracy of tlie reading in-strument. Trade NotesThe Westmount City Council lias authorized the re-duction of the rates for electric lighting to TJ/^ cents perkw. hour for a five year contract. The rate hitlurin on a flat scale of 8 cents i)er kw. hour The Sangamo Electric Company, Springlield. Illinois,announce that after July first their Chicago office will be lo-cated with the Delta-Star Electric Company, whose presi-dent, Mr. II. \V. Young, is also manager for the SangamoCompany. ed pages 11-14 of their sectional catalogue. These pagescontain a complete description of the automatic and non-automatic Gibbs type train connectors for use in steamrailroad train lighting. Mr
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