Air Pump Small 320×195 Medium 640×390 Large 1024×623 Download Tiff Original 2400×1461 | (633.7 KB) Description "The air pump is an instrument for removing a gas from a closed vessel, the essential parts are shown." -Avery 1895 Keywords air, pump, remove, Vacuum, vessel Galleries Chemistry Apparatus Source: Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 195
