PROCEEDINGS OE 

 THE ROYAL SOCIETY. 



vol. xvii. No. 109. 



CONTENTS. 



February 4, 1869. 



PAGE 



I. On Fossil Teeth of Equines from Central and South America, referable to 

 Eqtius conversidens, Fquus tau, and Equus areidens. By Professor 



Owen, F.R.S 267 



II. Compounds Isomeric with the Sulphocyanic Ethers. — III. Transformations 

 of Ethylic Mustard-oil and Sulpho cyanide of Ethyl. By A. W. Hof- 



mann, Ph.D., M.D., LL.D., F.R.S 269 



III. On the Solar Protuberances. By M. Janssen. In a Letter to Warren 



De la Rue, F.R.S 276 



February 11, 1869. 



I. On the Structure and Development of the Skull of the Common Fowl 



(Gallus domesticus). By W. Kitchen Parker, F.R.S 277 



II. Determinations of the Dip at some of the principal Observatories in Europe 

 by the use of an histrument borrowed from the Kew Observatory. By 

 Lieut. Elagin, Imperial Russian Navy 280 



III. On a New Class of Organo-metallic Bodies containing Sodium. By J. 



Alpred Wanklyn, Professor of Chemistry in the London Institution . 286 



IV. On the Temperature of the Human Body in Health. By Sydney 



Ringer, M.D. (Lond.), Professor of Materia Medica in University 



College, London, and the late Andrew Patrick Stuart 2-87 



Y. Preliminary Note of Researches on Gaseous Spectra in relation to the 

 Physical Constitution of the Sun. By Edward Frankland, F.R.S., 

 and J. Norman Lockyer, F.R.A.S * . . . . 288 



February 18, 1869. 



I. On the Structure of Rubies, Sapphires, Diamonds, and some other Minerals. 



By H. C. Sorby, F.R.S., and P. J. Butler 291 



II. Note on a Method of viewing the Solar Prominences without an Eclipse. 



By William Huggins, F.R.S 302 



For continuation of Contents see the ±th vage of Wrapper. 



