X 



On the Thermal Effects of Elastic Fluids. By Professor William 

 Thomson, F.R.S., and J. P. Joule, Esq., F.R.S page 331 



On Claii-aut's Theorem and Subjects connected with it. By Matthew 

 Colhns, Esq., B.A.. Senior Moderator in Mathematics and Physics 

 of Trin. Coll. Dublin 332 



On the Change of Refrangibilitv of Light. — No. 11. Bv Professor 

 Stokes, M.A., F.R.S ' 333 



Researches in Embrvolosv; a Note supplementary to Papers pub- 

 lished in the Philosophical Transactions for 1838, 1839 and 1840, 

 shomng the confirmation of the principal facts there recorded, and 

 pointing out a correspondence between certain structm'es connected 

 with the Mammiferous 0\ima and other Ova. By Martin Barry, 

 M.D., F.R.S.. F.R.S.E ' 335 



On the Nerves which supply the Muscular Stmcture of the Heart. 

 By Robert Lee, M.D., F.R.S 337 



On the Influence of the Moon on the magnetic du-ection at Toronto, 

 St. Helena, and Hobarton. Bv Colonel ]Edwai'd Sabine, R.A., Y.P. 

 andTreas 338 



Extract of a letter fi'om Lieut. Gilliss, U.S.N, to Colonel Sabuie, R.A., 

 on the United States', Expedition to Chih 339 



On the T-vpical Forms of the larse Secreting: Organs of the Human 

 Body. ' By Thomas H. Silvester, M.D. 340 



On some of the Products of the Decomposition of Nitrotoluyhc Acid. 

 By Hemy M. Noad, Ph.D., Lectm-er on Chemistry at St. George's 

 Hospital 3/3 



Extract of a Letter fi'om Dr. Edward Yogel to Colonel Sabine on the 



Expedition to Central Africa 374 



Notice of a Comet seen from H.M. Brig Penguin off the Coast of South 

 -Aii'ica. By W. B. Edwards, Master H.M. Brig Penguin 375 



On a New Method of propagating Plants. Bv E. J. Lowe, Esq., 

 F.R.A.S., F.G.S., &c ' 376 



On the Acidity, Sweetness, and Strength of Wiiie, Beer and Spirits. 

 By H. Bence Jones, M.D., F.R.S 378 



An Inquiry into some of the circumstances and principles which regu- 

 late the production of Pictures on the Retina of the Human Eye, 

 ^^-ith their measm-e of endm-ance, their Colours and Changes. By 

 the Rev. W. Scoresby, F.R.S., Corresponding Member of the Insti- 

 tute of France, &c 380 



On certain Properties of Square Numbers and other Quadratic Forms, 

 with a Table by which all the odd numbers up to 9211 may be re- 

 solved into not exceedins four square numbers. By Su' Frederick 

 Pollock, F.R.S.. &c. ; 383 



1854. 



On some New and Simple Methods of detecting Manganese in Natm-al 

 and Artificial Compounds, and of obtaining its Combinations for 

 ceconomical or other uses. Bv Edmund Davy. Esq., F.R.S., M.R.I. A., 

 &c : .' 386 



