from The Century Dictionary and Cyclopedia
- n. An air-compressor; a machine for compressing any substance.
- n. A testing-machine for finding the compressive strength of materials.
- n. A machine for determining the physical constants of gases, as vapor pressure, critical temperature, etc. It consists of a wrought-iron barrel to hold mercury, into which compression-tubes for gases, and manometers are inserted at a, a′ , and a″.
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