EXPLORES! Met History activities: Thermometers "DID YOU KNOW?" listing of interesting historic thermometer facts courtesy of Philadelphia Instruments, Inc. . Qtek Soft Thermometer Still Waters Snow Thermometer Ask the Cyberchef AWE Table of Contents Thermometer module Max-Min thermometer, Kitchen Helpmate--Meat Thermometer... Thermometers Wee Care(tm) Pacifier Thermometer About Temperature http://kerouac.pharm.uky.edu/HomeTest/Ovulate/btherm/OBTmoa.html Hans G. Wetzel, Barometer and Thermometer collector Celsius temperature scale Calibration A NASA perspective. http://sunland.gsfc.nasa.gov/info/motif_faq/part1.html Miami Museum of Science-Thermometer Pool Thermometers The Weather Mall - Unique Gifts The Weather Shops - Unique Gifts, too Formosa Thermometer & Barometer Manufacturing Co., Ltd. Galileo ThermometersThe density of liquids varies with temperature - Galileo Galilei (1564 - 1642). This principle is used in glass thermometers of his design, where globes of slightly differing weight sink or float as the temperature changes. A tag on each globe indicates temperature. You might call these Liquid in Glass in Liquid in Glass thermometers. They are different!.