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Letter from George Airy
Add. MS a/200/3 · Item · 10 Aug. 1826
Part of Additional Manuscripts a

Orleans - GA and his students are settled in Orleans and 'in as satisfactory a state of stable equilibrium as can be expected'. If his paper in the Philosophical Transactions has been published could WW send him 70 copies. Could WW tell [Henry] Kater 'that I have investigated a theory of the pendulum...as he suggested to me: and that the interval to reappearance does not follow so simple a law as he seemed to imagine?' And if he sees Young, that further to his letter addressed to GA in the Quarterly Journal, 'I get a different result? The result however consolidates his influence. The problem is, to find the form of a thin revolving fluid surrounding a nucleus'.

Letter from George Airy
Add. MS a/200/4 · Item · 16 Sept. 1826
Part of Additional Manuscripts a

Orleans - GA has not heard from John Herschel and is not sure whether he has reached Paris yet - perhaps he is with Arago? Could WW send the GA's papers to his forthcoming address in Paris [see GA to WW, 10 August 1826]. [Henry] Kater was perfectly satisfied with the correction of Lambton's error: 'moreover I discussed with him most vehemently the question of disappearance and reappearances versus disappearances only and persuaded him at least to confess that the disappearances only would not give a right result except all circumstances such as the rate of the pendulum on the clock, the arcs of the two pendulums, and the magnitudes of the discs, were the same. He hoped that in giving an account to the Royal Society we should not spare Parkinson'. GA outlines the part of the account he is to contribute. He is 'thinking of means to make chronometers transportable in a kibble & various other things, and will bring you a complete plan for conducting the operations. Of course I shall not do anything till I have seen you'.