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Electrical instruments for determining the moisture, temperature, and soluble salt content of soils (1899)

Briggs, Lyman J. (Lyman James), 1874-1963 · Washington, Govt. Print. off. · leaf 35

An illustration from Electrical instruments for determining the moisture, temperature, and soluble salt content of soils, 1899, leaf 35
r the location and correction of 31 faults in the former instrument will apply equally well to the latter.The thermometer differs from the hygrometer only in the addition of acomparison coil, the connections for which are seen in the accompany-ing diagrammatic sketch of the instrument (fig. 10).… … COMPARISONCOIL BINDING POST INDUCTION COIL BATTERY BATTERY SWITCH Fig. 10.—Diagram of interior connections of electrical thermometer. given by a good mercury thermometer. Place a temperature coil in alarge bucket of water at about room temperature, allow it to remainfor several minutes to acquire…

Soils Analysis · Electric apparatus and appliances

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