Pyrometer Small 67×320 Medium 134×640 Large 214×1024 Download Tiff Original 501×2400 | (237.0 KB) Description An instrument used used for measuring the changes produced in the dimesnsions of solid bodies with applied heat. Keywords thermocouple Galleries Chemistry Apparatus Source: William Dwight Whitney The Century Dictionary and Cyclopedia: An encyclopedic Lexicon of the English Language (New York, NY: The Century Co., 1889)