The subjects of conversation at Kant's table were drawn chiefly from natural philosophy, chemistry, meteorology, natural history, and above all, from politics. The news of the day, as reported in the public journals, was discussed with a peculiar vigilance of examination. With regard to any narrative that wanted dates of time and place, however otherwise plausible, he was uniformly an inexorable sceptic, and held it unworthy of repetition. So keen was his penetration into the interior of political events, and the secret policy under which they moved, that he talked rather with the authority of a diplomatic person who had access to cabinet intelligence, than as a simple spectator of the great scenes which were unfolding in Europe. At the time of the French Revolution, he threw out many conjectures, and what were then accounted paradoxical anticipations, especially in regard to military operations, which were as punctually fulfilled as his own memorable conjecture in regard to the hiatus in the planetary system between Mars and Jupiter,[Footnote: To which the author should have added--and in regard to the hiatus between the planetary and cometary systems, which was pointed out by Kant several years before his conjecture was established by the good telescope of Dr. Herschel. Vesta and Juno, further confirmations of Kant's conjecture, were discovered in June 1804, when Wasianski wrote.] the entire confirmation of which he lived to witness on the discovery of Ceres by Piazzi, in Palermo, and of Pallas, by Dr. Olbers, at Bremen. These two discoveries, by the way, impressed him much; and they furnished a topic on which he always talked with pleasure; though, according to his usual modesty, he never said a word of his own sagacity in having upon _à priori_ grounds shown the probability of such discoveries many years before.