A manual of electricity, magnetism and meteorology (1844)
Lardner, Dionysius, 1793-1859, Walker, Charles Vincent, 1812-1882 · London Longman, Brown, Green & Longmans · leaf 127
m during the existence of the maximum pressure.M is the safety valve ; N is a cap covering a jet, that isemployed for illustrating a certain mechanical action ofa jet of steam. O O, &c, are six stout pillars of greenbottle glass, by means of which the boiler is insulated atthree feet from the… … when the experiments commence. The boiler is casedin wood to reduce radiation of heat Fig. 99 f. is a zinc
Atmospheric electricity · Electricity -- Early works to 1850 · Magnetism
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