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Updated: June 20, 2025
The only occasion on which I met Leverrier was after the incident I have mentioned, in the Academy of Sciences. I had been told that he was incensed against me on account of an unfortunate remark I had made in speaking of his work which led to the discovery of Neptune.
The result was that while he did much to promote the reputation of the observatory in the direction of physical investigation, he did not organize any well-planned system of regular astronomical work. When Leverrier succeeded Arago, in 1853, he had an extremely difficult problem before him.
Neither at Paris nor at Greenwich was any optical search undertaken; but Professor Airy wrote to ask M. Leverrier the same old question that he had fruitlessly put to Adams: Did the new theory explain the errors of the radius vector or not? The reply of Leverrier was both prompt and satisfactory these errors were explained, as well as all the others.
He reddened again, and to divert it felt in his satchel and took out a rock. Then he looked across at the hills again: "If I do trace up that vein of coal and the iron which is needed with it when I do for I know it is here as well as Leverrier knew that Neptune was in our planetary system by the attraction exerted when I do " He looked at her again. He could not say the words.
The genius of a Laplace or a Lagrange was expended, and worthily expended, in efforts to show how one planet acted on another planet, and produced irregularities in its orbit; the genius of an Adams and a Leverrier was nobly applied to explain the irregularities in the motion of Uranus, and to discover a cause of those irregularities in the unseen Neptune.
'One should have seen M. Lescarbault, says Moigno, 'so small, so simple, so modest, and so timid, in order to understand the emotion with which he was seized, when Leverrier, from his great height, and with that blunt intonation which he can command, thus addressed him: "It is then you, sir, who pretend to have observed the intra-mercurial planet, and who have committed the grave offence of keeping your observation secret for nine months.
He had made a formal statement of this outrage to the Academy of Sciences, in order that posterity might know what kind of men were besieging Paris. I suggested that the shells might have fallen in the place by accident; but he maintained that it was not the case, and that the bombardment was intentional. The most execrated man in the scientific circle at this time was Leverrier.
Using the imperfect materials available, but with exquisite skill as a Phidias might model an exquisite figure of materials that would presently crumble into dust Leverrier came to the conclusion that Vulcan would cross the sun's disc on or about March 22, 1876.
The lamb, as the Abbé calls the doctor, trembling, stammered out an account of what he had seen. He explained how he had timed the passage of the black spot. 'Where is your chronometer? asked Leverrier. 'It is this watch, the faithful companion of my professional journeys. 'What! with that old watch, showing only minutes, dare you talk of estimating seconds.
This fact would entitle us to conclude that no such planet exists if its existence had been merely conjectured, or if it had been deduced from any of the laws of planetary distance, or even if Leverrier or Adams had announced it as the probable result of planetary perturbations.
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