"One of the more interesting uses I've seen was in a chemistry lab at a university (research, not manufacturing). A transit (older, early 20th c) theodolite was set up on one side of the lab. A chemical process that gave off a gas was being investigated. The gas was vented through a long, vertical, glass pipe. Inside the pipe, a fine, glass coil spring was hung with a small glass plate on the lower end. Since the (initially very clean) glass would absorb the gas on its surface, the weight of the gas would cause the spring to lengthen. The theodolite was used to measure the displacement of the glass plate and that deflection was, in turn, used to determine the amount of gas absorbed on the glass spring + plate. Michael Daly 17:14, 6 October 2007 (UTC)" (https://en.wikipedia.org/wiki/Talk%3ATheodolite).
Nonostante ci fossero altre più classiche connessioni tra il magnetismo e la chimica, penso che questa possa essere più interessante e magari leggermente meravigliosa, anche se non si addice perfettamente al teodolite magnetico.
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