Thalassa; an essay on the depth, temperature, and currents of the ocean . HEAT =80 Scale 2/^ Nat, Size. 1 ? I I I I I I The Miller-Casella Thermometer. 33 mixture, at a very low temperature in order to increase itsdensity. It acts as a sort of elastic cushion intended to over-come the friction of the liquids in the tubes, and to assist themercury in following the mixture when contracting under theinfluence of cold. The indications of the thermometer dependupon the expansion by heat and contraction by cold of themixture contained in bulb A. When expanding, the mercury isforced down in the arm a
Thalassa; an essay on the depth, temperature, and currents of the ocean . HEAT =80 Scale 2/^ Nat, Size. 1 ? I I I I I I The Miller-Casella Thermometer. 33 mixture, at a very low temperature in order to increase itsdensity. It acts as a sort of elastic cushion intended to over-come the friction of the liquids in the tubes, and to assist themercury in following the mixture when contracting under theinfluence of cold. The indications of the thermometer dependupon the expansion by heat and contraction by cold of themixture contained in bulb A. When expanding, the mercury isforced down in the arm attached to this bulb and rises in theother arm towards bulb C ; when contracting, the mercury fallson the side of bulb C, and rises towards bulb A. Two metalindices, a a, mark the maximum height which the mercury hasreached in either arm, and a hair attached to each index pro-duces the friction necessary to retain them at the level to whichthey have been raised. Before the thermometer is lowered intothe sea, the indices are brought down upon the mercury bypassing a m
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Keywords: ., bookcentury1800, bookdecade1870, bookidthalassa, booksubjectocean
