English: Drawing of a Thomsonreflecting galvanometer from around 1880, showing use. The vertical tube contains a fine silk fiber, which suspends a 1/2 in. mirror with small magnets on its back, seen in window, in the center of a coil of wire. A light beam reflected from the mirror lands on a scale and serves as a pointer. Tom Perera's Scientific instrument collection says this was a Model 502, made by Elliot Bros., London. It has interchangeable coils of from 150 to 5000 ohms resistance. The left drawing is from Schneider, the right from Thompson. Alterations: removed captions, rotated Schneider image so it was vertical, scaled Thompson image by 0.60, combined images.
Public domain - authors died more than 70 years ago
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Ez a mű közkincs abban az országban, ahol elkészítették, és minden olyan további államban, ahol a szerzői jogi védelmi idő a szerző élete plusz 70 év vagy kevesebb.
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== Summary == {{Information |Description=Drawing of a Thompson reflecting galvanometer from around 1900. The vertical tube contains a fine silk fiber, which suspends a 1/2 in. mirror with small magnets on its back, seen in window, in the center of a coil