1S50. 



Expeiiments and Observations upon the Properties of Light. By 

 Lord Brougham, F.R.S, kc page 900 



Electro-Physiological Researches. — 7th Series. By Prof, Carlo 

 INIatteucci , 902 



Researches respecting the Aloiecular Constitution of the Volatile Or- 

 ganic Bases. By Dr. A. W. Hofmann 904 



Obsen-ations on the Freezing of the Albumen of Eggs. By James 

 Paget, Esq., Professor of Anatomy and Surgery to the Royal College 

 of Surgeons 906 



On the establishment of a Central Physical Observatory at St. Peters- 

 burg, a letter from 'M. Kupiier to Lieut. -Col. Sabine, For. Sec R.S. 907 



A Letter from Captain C. AL Elliot, IMadras Engineers, to Lieut. -Col. 

 Sabine, For. Sec. R.S., transmitted through the Court of Directors 



of the East India Company 908 



On the gaseous transformation of Water, by means of a pile in two 

 separate compartments having no other electric communication be- 

 tween them besides coDductiuz vrires of copper, and givino:, in the 

 one oxygen alone; and hydrogen alone in the other. Bv M. Daniel 

 Paret '.^ ~ '. 911 



An account of a remarkable Aurora Borealis seen at Montreal on the 

 13th 01 August 1540. By Air. Thomas McGinn 911 



On the Development of the P\.etina and Optic Nerve, and of the Mem- 

 branous Labvrinth and Auditorv Nerve. Bv Henr\' Gray, Esq. 



M.R.c.s. ..: ; ; ; '. 912 



Tide Researches. — Fourteenth Series. On the Results of continued 

 Tide Observations at several places on the British Coasts. Bv the 

 Rev. W. AMievrell, D.D. F.R.S. kc '. 915 



On the development and homologies of the Molar Teeth of the Wart- 

 Hogs (Phacochaerus , with iilustrations of a System of Notation for 

 the Teeth in the Class Alammaiia. Bv Richard Owen, Esq. F.R.S. 

 &c 916 



Description of the Hydrostatic Log. By the Rev. E. L, Berthon, M.A. 919 



Supplementary Observations on the Structure of the Belemnite and 

 Belemncteuthis. By Gideon Algernon Alantell, Esq. LL.D. F.R.S., 

 Vice-President of the Geological Society, Sec 920 



On the Pelorosaurus ; an undescribed gigantic terrestrial reptile, wliose 

 remains are associated with those of the Iguanodon and other 

 Saurians, in the Strata of Tilgate Forest. By Gideon Algernon 

 IMantell, Esq. LL.D. F.R.S., Vice-President of the Geological So- 

 ciety, kc r 921 



On the Extension of the Principle of Fermat's Theorem of the Poly- 

 gonal Numbers to the higher orders of series whose ultimate differ- 

 ences are constant. With a new Theorem proposed, applicable to 

 all the Orders. By Sir Frederick Pollock, Lord Chief-Baron, F.R.S. 922 



Experiments on the section of the Giossophaiyngeai and Hypoglossal 

 Nerves of the Frog, and Observations of the alterations produced 

 thereby in the Structure of their primitive fibres. Bv Augustus 

 Waller, M.D ' T. 924 



