Text Online
From:
John Tyndall
To:
Thomas Archer Hirst
Date:
Saturday Night
Source of text:
MS JT/1/HTYP/4; MS JT/1/T/984, RI
Summary:
No summary available.
Contributor:
Tyndall Project
No summary available.
Congratulations on finishing his paper. Would he check over the proofs. Richard Jones is well, though not well enough to attend at the College chapel. J. E. D. Bethune and John Lefevre are staying with Jones. Bethune starts for India in February.
Destroy all HW's letters claiming errors in Leonhard Euler's values for Bernoulli's numbers. Mr. Hensley of Trinity College found weakness in HW's continued subtraction method. Clarifies symbols HW used to represent P. S. Laplace's expressions of Bernoulli's numbers.
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Continues explicating P. S. Laplace's formula for determining Bernoulli's numbers. Concerned that JH sees HW claiming too much for HW's continued subtraction method.
Thanks JH for the gift of the Cape Results, and comments on his impending move to Lausanne.
Has repaired the damage to his equatorial. Observed another of Wilhelm Struve's double stars last evening. Compares some of their star readings.
Some small disagreement about the bill for the refractor [see GM's 1847-10-16].
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Arrangements for JL's presentation to be made to the R.A.S.
Asks whether JL wishes to present method [see JH's 1847-12-4] at next R.A.S. meeting.
Suggests John Lubbock's improvements in calculating planetary perturbations be discussed at a R.A.S. meeting. Plans to bring subject before the Council.
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JDH hopes to be at Aden tomorrow. On arrival at Alexandria 4 Dec Ld Dalhousie insisted he belong to his suite in future. Left Alexandria on Sunday for Cairo. Travelled with Captain Henderson & officers using Transit Offices steamer along the Makmoudea [Mahmoudieh] Canal, discusses the canals construction & death of many Egyptians. Describes landscape, mentions Tamarix, Dates, Acacias, Cyprus & Myrtle. Switched to a pleasure packet steamer placed at their disposal by Mehmet Ali [Muhammad Ali]. Describes luxurious fittings in the part for Lord & Lady Dalhousie. The rest of them: including the Prime minister of Egypt, messed on deck in little cabins with simple facilities. Describes the Nile as about as broad as the Thames at Kew, mentions reading Bruce's and Salt's travels in the past. River banks are cliffs of mud showing successive layers of deposited soil to which Egypt owes its scanty vegetation. Saw lonely Arabs, Dromedary, tents, & donkeys. Beyond river banks wide spread uninhabited sand deserts. Irrigation attempted here & there, houses rare & always built near trees. Numerous boats such as figured in Bruce's journey. Describes first glimpse of the Pyramids & Cairo. Few miles before the town are Mehmet Ali's country gardens and Palaces of Shoobra [Shubra]. Thinks the Leicester Square Panorama gives an admirable idea of Cairo's location. During Cairo stay visited Ali Pasha's Rhoda Gardens but on the whole disappointed & outlines the difficulties of an exotic garden in Egypt. Mr Traill received him very cordially & showed him the gardens which JDH briefly describes. Letter continues Aden 19 Dec. Describes Aden as wonderful, bleak & barren. Dr M[?] has gone to Bombay for good & is now at Scinde [Sindh]. The bulbs JDH would have are not above ground & everything but Capparis, & a few other things are burnt up. He has sent Lord Auckland's parcel of seed onto Bombay [Mumbai].
Seeks permission from the Trustees of the British Museum to borrow the cirripede specimens in the public collection. Explains his intention to produce a monograph of the Cirripedia.