viii 



On the evidence of the existence of the Decennial Inequality in the 

 Solar-diurnal Variations, and its non-existence in the Lunar- 

 diurnal Variation of the Magnetic Declination at Hobarton. By 

 Major-General Sabine, R.A., D.C.L., Treas. and V.P.R.S. . page 314 



On the Function of the Thyroid Body. By Peter Martyn. Esq., 

 M.D. Lond., Surgeon R.N 315 



Experimental Researches on the Strength of Pillars of Cast Iron. 

 By Eaton Hodgkinson, Esq., F.R.S 318 



Memoir on the Symmetric Functions of the Roots of certain Systems 

 of two Equations. By Arthur Cayley, Esq., F.R.S 322 



Memoir on the Resultant of a System of two Equations. By Arthur 

 Cayley, Esq., F.R.S 322 



Memoir on the Symmetric Functions of the Roots of an Equation. 

 By Arthur Cayley, Esq., F.R.S 323 



Memoir on the Conditions for the Existence of given Systems of 

 Equalities among the Roots of an Equation. By Arthur Cayley, 

 Esq., F.R.S. . . . . . . . . ... 324 



Tables of the Sturmian Functions for Equations of the Second, Third, 

 Fourth and Fifth Degrees. By Arthur Cayley, Esq., F.R.S. . . 325 



Photo-chemical Researches. Part II. Phenomena of Photo-chemical 

 Induction. By Prof. Bunsen and H. E. Roscoe, B.A 326 



Observations on Glaciers. By John Tyndall, Esq., F.R.S., and 

 Thomas H. Huxley, Esq., F.R.S 331 



On some of the Products of the Destructive Distillation of Boghead 

 Coal. Part I. By C. Greville Williams, Esq. ....... 338 



On the Optical Characters of certain Alkaloids associated with 

 Quinine, and of the Sulphates of their lodo-compounds. By 

 W. B. Herapath, M.D 340 



On the Nervous System of Lumbricus terrestris. By J. Lockhart 

 Clarke, Esq., F.R.S " 343 



An Account of the two Methods of Reproduction in Daphnia, and of 

 the Structure of the ' Ephippium.' By John Lubbock, Esq., F.G.S. 352 



On the Thermo-electricity of Ferruginous Metals, and on the Thermal 

 Effects of Stretching Solid Bodies. By J. P. Joule, F.R.S. . . 355 



The Bakerian Lecture. On the Relations of Gold and other Metals 

 to Light. By M. Faraday, Esq., F.R.S 356 



On the Photography of the Moon. By William Crookes, Esq. . . 363 



Researches on the Reproductive Organs of the Annelids. By Thomas 

 Williams, M.D., F.L.S., Physician to the Swansea Infirmary . . 371 



Addition to a Memoir on the Determination of Unknown Functions 

 that are evolved under Definite Integrals. By J. Gomes de Souza, 

 Esq 376 



