Electricity for public schools and colleges . Fig. i. Fig. ii. Further, the space between P Q and C was air-tight ; bymeans of a tap any gas could be introduced, and P Q could apart so as to admit of the introduction of various dielec-trics into the space between C and P Q. {b) The potentials of B at different times could be compared (notmeasured in absolute units) by touching B with an insulated ballof a certain size, communicating this charge to a torsion balance{see Chapter IV. § 12 (i.)), and observing the torsions needed in thedifferent cases to keep the needle deflected at con
Electricity for public schools and colleges . Fig. i. Fig. ii. Further, the space between P Q and C was air-tight ; bymeans of a tap any gas could be introduced, and P Q could apart so as to admit of the introduction of various dielec-trics into the space between C and P Q. {b) The potentials of B at different times could be compared (notmeasured in absolute units) by touching B with an insulated ballof a certain size, communicating this charge to a torsion balance{see Chapter IV. § 12 (i.)), and observing the torsions needed in thedifferent cases to keep the needle deflected at constant angle. CH. IX. SPECIFIC INDUCTIVE CAPACITIES 125 JS^ote.—As this method of comparing potentials is obsolete, we merely stattthat they can be so compared ; we do not go further into the matter. (r) For his experiments it was necessary to have two such con-densers that were of exactly equal capacities when filled with air. To test whether this were the case, he charged the one andmeasured the potential of its knob B. He then connected
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Keywords: ., bookcentury1800, bookdecade1890, bookpubl, booksubjectelectricity
