FOOTNOTES:
[1] One of my critics remarks, that he does not see the wit of calling Goethe’s ‘Farbenlehre’ and Bain’s ‘Logic,’ ‘two volumes of poetry.’ Nor do I.
[2] Induction, page 422.
[3] This glass, by reflected light, had a colour ‘strongly resembling that of a decoction of horse-chestnut bark.’ Curiously enough Goethe refers to this very decoction:—‘Man nehme einen Streifen frischer Rinde von der Rosskastanie, man stecke denselben in ein Glas Wasser, und in der kürzesten Zeit werden wir das vollkommenste Himmelblau entstehen sehen.’—Goethe’s Werke, b. xxix. p. 24.
[4] A resolute scrutiny of the experiments, recently executed with reference to this question, is sure to yield instructive results.
[5] Sir William Thomson.
[6] In the ‘Prefatory Letter’ to his ‘Lay Sermons,’ Mr. Huxley speaks of ‘microscopists, ignorant alike of Philosophy and Biology.’ With reference to one conspicuous member of this class, a doctor of medicine, lately professor in a London college famous for its orthodoxy, both Mr. Huxley and myself have long practised, and shall, I trust, continue to practise, the tolerance recommended above.
[7] An Address to the Mathematical and Physical Section of the British Association assembled at Norwich on August 19, 1868.
[8] From an article headed ‘Physics and Metaphysics,’ in the Saturday Review for August 4, 1860.
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