. Electric railway journal . MODEL 280, SingleRanee PortableVoltmeter. (One-quarter Size.) WESTON Miniature Precision Instrumentsfor Direct Current A new group of very small Indicating Instruments COMPACT—ACCURATE—DURABLE—BEAUTIFUL. MODEL 280, TripleRange PortableVolt-Ammeter. (One-ana rter Slie.) PORTABLE Mll-

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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp