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Page- 

 On the Eefraction of Plane Polarised Light at the Surface of a Uniaxal 

 Crystal. II. By E. T. Glazebrook, M.A., F.E.S., Fellow and Lecturer 

 of Trinity College, Demonstrator in the Cavendish Laboratory, Cam- 

 bridge 393 



List of Presents , 395 



No. 223.— December 21, 1882. 



On the Normal Paraffins. Part IV. By C. Schorlemmer, F.E.S., and 

 T. E. Thorpe, F.E.S 405 



On the Connexion between the State of the Sun's Surface and the Hori- 

 zontal Intensity of the Earth's Magnetism. By Balfour Stewart, 

 F.E.S :.. 406 



On a Method of Photographing the Solar Corona without an Eclipse. 

 By William Huggins, D.C.L., LL.D., F.E.S 409 



On the Dark Plane which is formed over a Heated Wire in Dusty Air. 

 By Lord Eayleigh, F.E.S., Professor of Experimental Physics in the 

 University of Cambridge 414 



On the Origin of the Hydrocarbon Flame Spectrum. By G. D. Liveing, 

 M.A., F.B.S., Professor of Chemistry, and J. Dewar, M.A., F.E.S., 

 Jacksonian Professor, University of Cambridge 418 



On the Inversion of the Blastodermic Layers in the Eat and Mouse. By 

 Alexander Fraser, M.B., &c, Owens College, Manchester 430 



On the Electric Discharge with the Chloride of Silver Battery. By 

 Warren De La Sue, M.A., D.C.L., F.E.S., and Hugo W. Muller, Ph.D., 

 F.E.S 437 



January 11, 1883. 



Experiments, by the Method of Lorentz, for the further Determination of 

 the Absolute Value of the British Association Unit of Eesistance, with 

 an Appendix on the Determination of the Pitch of a Standard Tuning- 

 Fork. By Lord Eayleigh, F.E.S., Professor of Experimental Physics 

 in the University of Cambridge, and Mrs. H. Sidgwick 438 



On the Skeleton of the Marsipobranch Fishes. Part I. The Myxinoids. 

 {Myocine and Bdellostoma.) By W. K. Parker, F.E.S 439 



The Direct Influence of Gradual Variations of Temperature upon the 

 Eate of Beat of the Dog's Heart. By H. Newell Martin, M.A., M.D., 

 D.Sc, Professor in the Johns Hopkins University, Baltimore, U.S.A... 444 



January 18, 1883. 



Preliminary Paper on a Uniform Eotation Machine ; and on the Theory 

 of Electromagnetic Tuning Forks. By E. H. M. Bosanquet, St. John's 

 College, Oxford 445 



On the Skeleton of the Marsipobranch Fishes. Part II. The Lamprey. 

 By W. K. Parker, F.E.S 447 



