File:Western Union standard galvanometer.jpg
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Date/Time | Dimensions | User | Comment | |
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current | 17:03, 10 December 2007 | 738 × 818 (95 KB) | 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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