File:Western Union standard galvanometer.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	00:03, 11 December 2007		738 × 818 (95 KB)	commons>Chetvorno	{{Information \|Description=Drawing of tangent galvanometer from around 1890, made by J.H. Bunnel Co. Base 7 in. diameter. This was a type known as a 'Western Union standard'. It has 5 separate coils of resistance ~0, 1, 10, 50, and 150 ohms. The 7/8

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