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Mathematical Treasures - German protractor

Frank J. Swetz and Victor J. Katz


Brass protractor from about 1700 of German manufacture. Its base plate contains some Baroque decoration. Note its similarity to a present day student protractor.

Index of Mathematical Treasures

Index of Mathematical Objects


Frank J. Swetz and Victor J. Katz, "Mathematical Treasures - German protractor," Convergence (January 2011)

Mathematical Treasures from the Smith and Plimpton Collections at Columbia University