Thermometer

thėr-mom′e-tėr, n. an instrument for measuring the variations of sensible heat or temperature.— adjs. Thermomet′ric , -al , pertaining to, or made with, a thermometer.— adv. Thermomet′rically .—For the Centigrade and the Fahrenheit scale and their relations to each other, see Centigrade and Fahrenheit. In the Réaumur scale, still largely used in Ru ia and Germany, the freezing-point is marked zero, and the space between this and boiling-point is divided into 80 degrees. To reduce it to Fahrenheit, multiply by 2¼ and add 32; to Centigrade, increase the number by one-fourth of itself. Thus: F = 9 ⁄ 5 C + 32 = 9 ⁄ 4 R + 32; C = 5 ⁄ 9 (F - 32) = 5 ⁄ 4 R; R = 4 ⁄ 9 (F - 32) = 4 ⁄ 5 C.— Maximum thermometer , one that registers the maximum temperature to which it is exposed; Minimum thermometer , one that registers the minimum temperature to which it is exposed. [Gr. thermē , heat, metron , a measure.]