Lynde, Carleton John, b. 1872 · New York, Macmillan · leaf 100
. 61. The spiral AB is made of two metals, a strip ofbrass on the outside and a strip of steel on the inside. Whenthe temperature rises, the spiral becomes more curved; and whenthe temperature falls, it becomes less curved. The thermometer HEAT IN THE HOME shown here is a recording thermometer. A… … FIG. 61.— A solid recording thermometer. the temperature falls the decreased curvature lowers the pointC. A pen attached to the point C makes a trace on the paperand thus records the temperature. The ordinary oven thermometers are solid thermometers.In some cases they are made with a spiral of two…
Physics · Home Economics
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