Sprengel's pyknometer Small 203×320 Medium 407×640 Large 651×1024 Download TIFF Original 1526×2400 | (169.7 KB) Description Sprengel's pynkometer, a u-shaped flask. Keywords chemistry, gravity, pyknometer, specific, Sprengel Galleries Chemistry Apparatus Source: Finley, John H. Nelson's Perpetual Loose-Leaf Encyclopedia (New York City: Thomas Nelson and Sons, 1917) 11:357