IV 



Page 



Results of an Inquiry into the Periodicity of Bainfall. By G. M. Whip- 

 ple, B.Sc., F.R.A.S., Superintendent of Kew Observatory 70 



Studies on the Electric Arc. By Professor James Dewar, M.A., F.R.S., 

 Fullerian Professor of Chemistry at the Royal Institution 85 



Note on the Spectra of Magnesium and Lithium. By G. D. Liveing, 

 M.A., Professor of Chemistry, and J. Dewar, M.A., F.R.S., Jacksonian 

 Professor, University of Cambridge 93 



January 22, 1880. 



On certain Definite Integrals. No. 6. By W. H. L. Russell, F.R.S 100 



On certain Definite Integrals. No. 7. By W. H. L. Russell, F.R.S 103 



On the Construction of a Glycerine Barometer. By James B. Jordan .... 105 



On a Possible Mode of Detecting a Motion of the Solar System through 

 the Luminiferous Ether. By the late Professor J. Clerk Maxwell,' 

 F.R.S. In a Letter to Mr. D.'P. Todd, of the Nautical Almanac Office, 



Washington, U.S 108 



January 29, 1880. 



English Reproduction Table. By Dr. W. Fair, F.R.S 110 



A Note on Protagon. By Arthur Gamgee, M.D., F.R.S., Brackenbury 

 Professor of Physiology in Owens College, Manchester Ill 



On the Induction of Electric Currents in Infinite Plates and Spherical 

 Shells. By C. Niven, M.A., Professor of Mathematics in Queen's 

 CoUege, Cork 113 



On the Physical Constants of Liquid Hydrochloric Acid. By Gerrard 

 Ansdell, F.C.S., Chemical Assistant to the Royal Institution 117 



List of Presents 122 



A Magnetic Survey of the Fortieth Parallel in North America between 

 the Atlantic Ocean and the Great Salt Lake, Utah. By T. E. Thorpe, 

 Ph.D., F.R.S 132 



No. 201.— February 5, 1880. 



On the Spectra of the Compounds of Carbon with Hydrogen and Nitro- 

 gen. By G. D. Liveing, M.A., F.R.S., Professor of Chemistry, and J. 

 Dewar, M.A., F.R.S., Jacksonian Professor, University of Cambridge.... 152 



On the Epipubis in the Dog and Fox. By T. H. Huxley, Sec. R.S 162 



I 



February 12, 1880. 



Studies on the Chinoline Series. By James Dewar, M.A., F.R.S., Jack- 

 sonian Professor, University of Cambridge 164 



