Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
te excitement to theglass or resin, and, therefore, they become attracted to the electritiedbody. Electrometers. 672. Electrometers.—The electroscope, previously described(652), serves only to indicate the presence and name of the electricity,but not the quantity. Electrometers are measures of… … one of the most simple of these contrivances. The distance to which they will diverge is a rough measure of the intensity of the electric force. Fig. 10. 673- Figure 10.—The quadrant electrom-eter consists of a slender stem or supi)ort of bakedwood, to which is affixed a semicircular piece ofivory,…
Physics · Astronomy
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