on resigning office, 27 October, 1890. xxv 



By Geo. Peacock, M.A. (Trin.) : On the analytical discoveries of Sir I. Newton. 

 (Concluded.) Mr Peacock read three unedited letters of Newton to Dr 

 Keill on the subject of the controversy on the discovery of the method of 

 fluxions. 



March 1, 1824. 



By Mr Okes : Notice of a magnificent collection of fossil bones, found near 



Barnwell, of the Elephant, Rhinoceros, Buffalo, Deer, Horse. 

 By Will. Mandell, M.A. (Qu.): A letter of Sir Isaac Newton to Mr Acland 



of Geneva was read. The following is a copy of the letter. 

 Vir celeberrime, 



Gratias tibi debeo quam maximas quod schema experimenti quo lux in 

 colores primitivos et immutabiles separatur, emendasti, et longe elegantius 

 reddidisti quam prius. Sed et me plurimum obligasti quod schema in 

 Camina senea incisum et inter imprimendum obtritum refici curasti, ut 

 impressio libri elegantior redderetur. Gratias igitur reddo tibi quam 

 amplissimos. Quod inventa mea de natura lucis et colorum viris summis 

 Domino Cardinali Polignac et Domino Abbati Bignon non displiceant, valde 

 gaudeo. Utinam haec vestratibus non minus placerent, quam elegantissimaj 

 vestrae et perfectissimge delineata? picturse nostratibus placuerunt. Ut Deus 

 te liberet a doloribus capitis et salvum conservet ardentissime precatur 

 Servus tuus humillimus et obsequentissimus 



Dabam Londini Isaacus Newton. 



22 Oct. 1722. 



Celeberrimo viro D n0 . Acland. 

 By Professor Sedgwick : On the geology of Teesdale. 



March 15, 1824. 



By Will. Mandell, M.A. (Qu.) : Description of a self-regulating lamp. 



By Geo. Biddell Airy, B.A. (Trin.) : On the figure of the planet Saturn. 



Trans, n. 203—216. 

 By Professor Sedgwick : On the geology of Teesdale (continued). 



March 29, 1824. 



By Will. Mandell, M.A. (Qu.) : On a means of protecting locks from the 



insertion of skeleton keys. 

 By G. Harvey, F.R.S.E., M.G.S.V. : On the fogs of the Polar seas. 

 By Professor Sedgwick : On the geology of Teesdale (concluded). Trans. II. 



139—195. 



May 3, 1824. 



By Cha. Babbage, M.A. (Pet.) : On the determination of the general terms 

 of a new class of infinite series. (Read by Mr Peacock.) Trans, n. 217— 

 225. 



By Geo. Biddell Airy, B.A. (Trin.) : On the construction of a new achromatic 

 telescope. 



May 17, 1824. 



By Joh. Hogg, B.A. (Pet.) : On two petrifying springs in the neighbourhood of 

 Norton in the County of Durham. (Read by Professor Henslow.) 



By Geo. Biddell Airy, B.A. (Trin.) : On the principle and construction of the 

 achromatic eyepieces of telescopes, and on the achromatism of micro- 

 scopes. Trans, n. 227 — 252. 



