Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 274
is that the pile deteriorateswith use — a circumstance which indicatesthat the generation of current is probablyconnected with some process of diffusion ofthe one metal through the other, the potentialdifference depending on the suddenness orgradient of the change from one metal tothe other, and… … Thermostat chemical and other purposes, e.g. in brewing.In an electric thermostat, the temperatureof the material worked on, acts on an elec-trical thei-mometer, of one type or another,which in turn controls the heat-supply tothe vessel containing the material, reducingit as the temperature rises,…
Electrical engineering
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