Well's natural philosophy : for the use of schools, academies and privte students, introducing the latest results of scientific discovery and research ; arranged with special reference to the practical application of physical science to the arts and the experiences of everyday life ; with three hundred and seventy-five engravings (1873)
Wells, David A · New York : Ivison, Blakeman, Taylor and Co. · leaf 393
formof a point, the electric fluid willescape, not in the form of a spark,but as a brush, or pencil of liglit,the diverging rays of which have sometimes a length of two or three inches.Fig. 328 represents this appearance. A substance parting with electricity generally exhibits an irregular spark,or… … ELECTRICITY. 389 that the duration of the light of the spark does notexceed the one-millionth part of a secoud.* When the coDtinuifcy of a substance conducting electricity is interrupted, aspark will be produced at every point where the course of the conductor iabroken. A great yariety cf beautiful…
Physics · Science · Technology
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