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  DSC04522.JPG - The OTT planimeter is based on an invention by Jacob Amsler (a student of the university of Königsberg) in 1856. "Polar" planimeters have two arms which join at the carriage with the dials and the two wheels moving over the paper when the pointing needle follows the curve.  
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The OTT planimeter is based on an invention by Jacob Amsler (a student of the university of Königsberg) in 1856. "Polar" planimeters have two arms which join at the carriage with the dials and the two wheels moving over the paper when the pointing needle follows the curve. Download
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