Hand Goniometer Small 320×288 Medium 640×576 Large 1024×922 Download Tiff Original 2400×2160 | (2.0 MB) Description "Goniometer. An instrument for measuring solid angles, or the inclination of planes, particularly the angles formed by the faces of crystals." -Whitney, 1911 Keywords crystals, hand goniometer, incline, math tool, measure angle, measurement Galleries Miscellaneous Math Tools Source: William Dwight Whitney The Century Dictionary: An Encyclopedic Lexicon of the English Language (New York, NY: The Century Co., 1911)
