NATURE, VOL I, January 20, 1870 Kant's Views on Space PROF. T. H. HUXLEY concludes a letter on this subject with . . . "there can be no doubt that that thorough and acute student of Kant, Dr. Ingleby, was perfectly right when he said that Kant would have repudiated the affirmation that 'space is a form of thought'. For in these sentences [quoted from Kant's writings], and in many others which might be cited, Kant expressly lays down the doctrine that thought is the work of understanding, intuition of the sense; and that space, like time, is an intuition. The only 'forms of thought', in Kant's sense, are the categories."