Piston and Rod Small 83×320 Medium 167×640 Large 267×1024 Download Tiff Original 626×2400 | (397.1 KB) Description "A piston and rod shown with attached weight. The valve, A, can be opened and closed as needed so that the piston can be moved." —Hallock 1905 Keywords air, hanging, piston, pressure, rod, weight Galleries Chemistry Apparatus Source: V. I. Hallock I.C.S. Refrence Library (Scranton: International Textbook Company, 1905) 9:20
