Trebel, George. [from old catalog] · New York, F. Tousey · leaf 35
an exceedingly delicate thermoscooe andthermometer. Quantities of heat, that would not perceptiblyexpand the mercury in an ordinary thermometer, can, by theuse of a thermo-electric pile, be made to produce large deflec-tions of the galvanometer needle. Heat radiated from thebody of an insect… … are the intensity of the current required, and the service re-quired, i. e., whether continuous, temporary or occasional cur-rents are wanted. The cost is of consequence, but thatmust be governed mainly by the preceding considerations.In the following table preferences are given to the…
Electricity
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![An illustration from Mundus subterraneus, in XII libros digestus : qvo divinum subterrestris mundi opificium, mira ergasteriorum naturae in eo distributio, verbo [pantamorphon] Protei regnum, universae denique naturae majestas & divitiae summa rerum varietate exponuntur, abditorum effectuum causae acri indagine inquistae demonstrantur, cognitae per artis & naturae conjugium ad humanae vitae necessarium usum vario experimentorum apparata, necnon novo modo & ratione applicantur. Ad Alexandrum VII. pont. opt. max. (1678)](https://img.insideoutlibrary.com/img/200/ia-mundussubterrane02kirc-281-146.webp)
