[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. [50] The accompanying diagram (Fig. 20) was not given by Faraday. It was pencilled by the author more than twenty years ago in the margin of his copy of Faraday’s “Experimental Researches,” vol. iii., p. 450, opposite this passage. [51] The discourse was to have been delivered by Wheatstone himself, who, however, at the last moment, overcome by the shyness from which he suffered to an almost morbid degree, quitted the Institution, and left the delivery of the discourse to Faraday. [52] The italics here are mine. S. P. T. [53] It is right to add that what, according to the theory explained in the text, must be the correct explanation of the peculiar phenomena of magnetic induction depending on magnecrystallic properties was clearly stated in the form of a conjecture by Faraday in his twenty-second series in the following terms: “Or we might suppose that the crystal is a little more apt for magnetic induction, or a little less apt for diamagnetic induction, in the direction of the magnecrystallic axis than in other directions” (Sir William Thomson, _Philosophical Magazine_, 1851, or “Papers on Electrostatics and Magnetism,” p. 476). [54] This is exactly Stokes’s theorem of “tubes” of force. S. P. T. [55] The italics are mine. S. P. T. [56] Once again did Faraday intervene in Royal Society affairs at the crucial time when Lord Rosse was elected President in 1848. The following excerpts from the journals of Walter White show the cause:-- “November 25th.--There have been many secret conferences this week--much trimming and time-serving. Alas for human nature!” “November 30th.--The eventful day, the ballot begun. Mr. Faraday made some remarks about the list.” [57] He was a Chevalier of the Prussian Order of Merit, also Commander in the Legion of Honour, and Knight Commander of the Order of St. Maurice and St. Lazarus. [58] Faraday’s nephew, Frank Barnard, stated in 1871 that the London congregation included amongst its members not more than twenty men, mostly quite poor, only seven or eight of them being masters of their own businesses, and that Faraday was for some time the wealthiest man of the fraternity. [59] C. M. Davies: “Unorthodox London,” page 284.