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Page 



The Force Function in Crystals. By Jj^red Einhorn, Ph.D 65 



On some Applications of Dynamical Principles to Physical Phenomena. 

 By J. J. Thomson, M.A., F.E.S., Fellow of Trinity College, and Caven- 

 dish Professor of Physics in the University of Cambridge 66 



On a New Constituent of the Blood and its Physiological Import. By 

 L. C. Wooldridge, D.Sc., M.B., Demonstrator of Physiology in Guy's 

 Hospital 69 



On the Marsupial Ovum, the Mammary Pouch, and the Male Milk 

 Glands of Echidna hystrix. By Wilhelm Haacke, Ph.D., Museum 

 Director to the Public Library, Museum, and Art Gallery of South 

 Australia, Adelaide, and late Assistant Director to the Zoological 

 Institute, Jena 72 



January 15, 1885. 



On the Chemical Composition of the Cartilage occurring in certain Inver- 

 tebrate Animals. By W. D. Halliburton, M.D., B.Sc. (Lond.), Sharpey 

 Physiological Scholar, University College, London 75 



On the Constant of Electromagnetic Rotation of Light in Bisulphide of 

 Carbon. By Lord Rayleigh, F.R.S 76 



Absorption-spectra Thermograms. By Captain Abney, R.E., F.R.S., and 

 Colonel Festing, RE 77 



Observations on the Upper Partial Tones of a Pianoforte String, struck 

 at one-eighth of its Length. By Alfred James Hipkins (of John 

 Broad wood and Sons, London) 83 



January 22, 1885. 



Observations on the Chromatology of Actiniae. By C. A. MacMunn, 

 M.A.,M.D 85 



On the Origin of the Proteids of the Chyle and the Transference of Food 

 Materials from the Intestine into the Lacteals. By E. A. Schafer, 

 F.R.S. From the Physiological Laboratory, University College, 

 London 87 



January 29, 1885. 



On some Physical Properties of Ice and on the Motion of Glaciers, with 

 special reference to the late Canon Moseley's objections to Gravitation 

 Theories. By the Rev. Coutts Trotter, M.A., Fellow of Trinity 

 College, Cambridge 92 



On the Structure and Rhythm of the Heart in Fishes, with special 

 reference to the Heart of the Eel. By J. A. Mc William, M.D., 

 Demonstrator of Physiology in University College, London. From the 

 Physiological Laboratory, University College, London 108 



On the Structure and Development of the Skull in the Mammalia. 

 Part III. Insectivora. By W. K. Parker, F.R.S 129 



List of Presents 



138 



