350 



ment for making approaches to London Bridge. After ineffectual 

 efforts to procure an arrangement more advantageous to the Society, 

 it was finally agreed to sell to the City the whole of the premises, 

 instead of dividing them, for the sum of £3150. This £3150, under 

 the terms of the Act in question, is to be paid into the Court of Ex- 

 chequer, and there remain until invested in freehold property, unless 

 in some subsequent Act the insertion of a clause can be procured, 

 authorizing its payment out of Court to the Royal Society. Every 

 effort was made, in correspondence with the City authorities, to ob- 

 tain payment of the money direct to the President and Council. But 

 this point has not been conceded: and it appearing unadvisable 

 legally to resist it, the Council have reluctantly given way. 



" On the 26th instant the Seal of the Society was affixed to Deeds 

 of bargain and sale of the freehold property in Coleman- street, from 

 the Royal Society to the City of London, and also to a Deed of en- 

 feoffment of the same property by the Society to the City, in con- 

 sideration of £3150 to be paid into the Court of Exchequer." 



The Secretary also read the following List of Fellows deceased 

 since the last Anniversary : viz. 



On the Home List. — His Royal Highness the Duke of Gloucester ; 

 Sir William Blizard, Knt. ; Sir. David Barry, Knt. ; The Marquis of 

 Breadalbane ; The Earl of Charleville ; The Bishop of Cloyne ; The 

 Earl of Darnley; LordDe Dunstanville ; Colonel Sir Augustus Simon 

 Frazer, K.C.B. ; Major-General Hardwicke ; Captain Kater; Rev. 

 Thomas Robert Malthus ; Thomas James Mathias, Esq. ; William 

 George Maton, M.D. ; Rev. Robert Morrison, D.D. ; Michael Thomas 

 Sadler, Esq. ; Richard Sharp, Esq. ; William Smith, Esq. ; Edward 

 Troughton, Esq. ; Sir George Lemon Tuthill, Knt. M.D. ; Ralph 

 Watson, Esq. 



On the Foreign List. — Frederich Stromeyer. 



The Secretary stated that of these only three, namely, Captain 

 Kater ; John Brinkley, Lord Bishop of Cloyne, and Edward Trough- 

 ton, Esq. have contributed papers to the Royal Society. 



Capt. Kater contributed the following papers, fifteen in number, to 

 the Philosophical Transactions. 



1 . On the light of the Cassegrainian Telescope, compared with that 

 of the Gregorian. (Phil. Trans. 1813, p. 206.) 



Having remarked the superiority in the performance of a Casse- 

 grainian telescope over those of similar dimensions in the Gregorian 

 construction, Capt. Kater made a series of experiments to determine 

 the comparative excellence of these two methods of constructing that 

 instrument. From a mean of these experiments and from a consi- 

 deration of all the circumstances in which they were made, he con- 

 cludes that the comparative superiority of the Cassegrainian over the 

 Gregorian telescope of equal apertures and magnifying powers, is 

 as 20 to 11, or very nearly twice as great. He conjectures that the 

 superiority of illumination in telescopes of the former construction 

 may possibly depend on their being exempt from the mutual inter- 

 ference of rays meeting in the same point, as happens in the Grego- 



