[40] The entire uselessness as well as the misleading effects of such unscientific nomenclature might well be taken to heart by those electrophysiologists and electrotherapeutists who still indulge in the jargon of “franklinisation,” “faradisation,” and “galvanisation.”
[41] In modern language this would be called the time-integral of the discharge. The statement is strictly true if the galvanometer (as was the case with Faraday’s) is one of relatively long period of oscillation.
[42] From ἄνω upwards and ὁδός a way; and κατά downwards and ὁδός a way. The words cathode and cation are now more usually spelled kathode and kation. Faraday sometimes spelled the word cathion (Exp. Res. Art. 1351), as did also Whewell (Hist. of Ind. Sciences, vol. iii. p. 166).
[43] Literally, the travellers, the things which are going.
[44] The term induction appears to have been originally used, in contradistinction to contact or conduction, to connote those effects which apparently are in the class of actions at a distance. Thus we may have induction of a charge by a charge, or of a magnet-pole by a magnet-pole. To these Faraday had added the induction of a current by a current, and the induction of a current by a moving magnet. Amid such varying adaptations of the word induction, there is much gain in allotting to the electrostatic induction of charges by charges the distinguishing name of influence, as suggested by Priestley.
[45] “Faraday as a Discoverer,” p. 67.
[46] Newton’s third letter to Bentley.
[47] Faraday’s definition is:—“By a diamagnetic, I mean a body through which lines of magnetic force are passing, and which does not by their action assume the usual magnetic state of iron or loadstone.” It was thus a term strictly analogous to the term dielectric used for bodies through which lines of electric force might pass.
[48] i.e. Specimen No. 174. Its composition was equal parts by weight of boracic acid, oxide of lead, and silica.
[49] Subsequent investigation has reduced this figure to about 186,400 miles per second, or about 30,000,000,000 centimetres per second.