CONTENTS. 



VOL. XXVII. 



No. 185.— January 10, 1878. 



. . Pa s e 



Magnetic Observations taken during the Transit of Yenus Expedition to 

 and from Kerguelen Island. By the Eev. S. J. Perry, S.J., F.B.S 1 



On the Limits to the Order and Degree of the Fundamental Invariants of 

 Binary Quantics. By J. J. Sylvester, M.A., LL.D., F.B.S., Professor 

 in the Johns Hopkins University, Baltimore, U.S 11 



On the Structure and Development of the Skull in the Common Snake 

 {Tropidonotus natrix). By W. K. Parker, F.B.S 13 



Observations on the Nervous System of Aurelia aurita. By Edward 

 Albert Schaf er, Assistant Professor of Physiology in University College, 

 London , 16 



January 17, 1878. 



On Cobra Poison. By Alexander Pedler, F.C.S., Professor of Chemistry 

 in the Presidency College, Calcutta 17 



On Eepulsion resulting from Badiation.. Part Y. By William Crookes, 

 F.E.S.,Y.P.C.S 29 



January 24, 1878. 



New Determination of the Mechanical Equivalent of Heat. By J. P. 

 Joule, LL.D., F.E.S 38 



The Cortical Lamination of the Motor Area of the Brain. By Bevan 

 Lewis, F.E.M.S., Pathologist and Assist. Med. Officer to the West 

 Biding Asylum, and Henry Clarke, L.E.C.P. Lond., Med. Officer to the 

 West Eiding Prison. (Plates 1-3) 38 



Besearches in Spectrum Analysis in connexion with the Spectrum of the 

 Sun. By J. Norman Lockyer, F.E.S 49 



