Electricity for public schools and colleges . Fig. ii. Fig. iii. The reader can verify this rule when he has determined the sign of thecharge on the prime conductor of his machine. (ii.) We may {see fig. iii.) intensify the effect by coiling a wire round aglass tube in which lies the steel needle. The above rule will be found true,and it will be seen to be equivalent to saying that if we face one end of thespiral coiled rotmd the tube, the tieedle will have been made n or s at that end,according as the discharge so viewed is against or tvith niovejtient of the handsof a watch. A reference to C
Electricity for public schools and colleges . Fig. ii. Fig. iii. The reader can verify this rule when he has determined the sign of thecharge on the prime conductor of his machine. (ii.) We may {see fig. iii.) intensify the effect by coiling a wire round aglass tube in which lies the steel needle. The above rule will be found true,and it will be seen to be equivalent to saying that if we face one end of thespiral coiled rotmd the tube, the tieedle will have been made n or s at that end,according as the discharge so viewed is against or tvith niovejtient of the handsof a watch. A reference to Chapter XVII. § 2 will make the rule clear. This experiment is one of the many that link together the electrostatical andelectrodynamical divisions of our subject. III. Heating effects. Experiment. — (i.) The brilliant light of the discharge, and the fact thatdischarges over the dust of various metals scattered over a glass surface givethe well-known spectrum of each metal respectively, indicate that in the dis-charge there is an elevation
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Keywords: ., bookcentury1800, bookdecade1890, bookpubl, booksubjectelectricity
