Thermometer 2 : An instrument for measuring temperature, consisting of a graduated glass tube with a sealed bore and a quantity of mercury or alcohol which rises or falls as it expands or contracts from change in heat
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}