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Is Miss Macqueen expected with him tomorrow and would she give the enclosed memo to JH [query as to whether the Duke of Gloucester was in Metz in 1776].
Wishes JH well on his upcoming trip to the Cape of Good Hope. Asks JH to study the lower part of the Scorpion, for William Herschel was mystified by the 'uncommon appearance of that part of the heavens.' [Written as a postscript to a letter by Margaret Herschel.]
Accepts JH's invitation to demonstrate [on 28 Aug.] CW's portable optical and acoustical experiments and the 'whirling machine.' Asks JH to supply 'an electrical machine and a good sized jar.' Encloses copy of CW's paper on Jew's harp. Will bring another paper and new 'Symphonion' for Mary Herschel.
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Wishes CD well on his trip to General Juan Manuel Rosas. CD is to send word when he wants a boat; there is no hurry, for there is plenty of work for the sounders. He envies CD’s travels.
Copy of letter to Hugh Percy (3rd Duke of Northumberland) stating that the Duke's offer of a refracting telescope of great power, to Cambridge Observatory would be a valuable gift. To JH: Remarks on gift of telescope, planet reduction money, and on his geological exploration of the Charnwood Forest.
Has visited Hugh Percy (3rd Duke of Northumberland) at Buxton, who suggests that JH approaches R. A. Cauchoix for the glass for the new telescope.
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The [Megatherium] fossils were extremely interesting and were shown at the Geological Section of the BAAS meeting at Cambridge [1833].
The plants delight him; will work them out with W. J. Hooker.
CD should send every fossil he can find; minute insects will be nearly all new. Delighted with descriptions of the few animals alluded to.
Agrees with JH to go direct to the French optician [see JH's 1833-8-9] for a large object glass; HP will provide a telescope with such a lens if G. B. Airy agrees such a large telescope is appropriate to Cambridge Observatory.
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Preparation to go to Madeira for health reasons.
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Hopes that JH will accept a copy of JN's work [on the history of astronomy]. Wishes JH all success in his forthcoming mission [to the Cape].
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