iv 



Page 



A Note on the Electrical Resistivity of Electrolytic Nickel. By J, A. 

 Fleming, M.A., D.Sc, F.R.S., Professor of Electrical Engineering, 

 University College, London.., 50 



Observations on the Morphology of the Blastomycetes found in Carcino- 

 mata. By Keith W. Monsarrat. M.B., F.E.C.S.E. Communicated by 

 Professor Sherrington, F.R.S 58 



Meeting of January 18, 1900, and List of Papers read 61 



Upon the Development of the Enamel in certain Osseous Fish. By 

 Charles S. Tomes, M.A., F.E.S 61 



Further Observations on ' Niti-agin ' and on the Nature and Functions 

 of the Nodules of Leguminous Plants. By Maria Dawson, B.Sc. 

 (Lond. and Wales), 1851 Exhibition Science Research Scholar. 

 Communicated by Professor H. Marshall Ward, F.R.S 63 



On the Innervation of Antagonistic Muscles. Sixth Note. By C. S. 

 Sherrington, M.A., M.D., F.R.S 66 



On the Viscosity of Argon as affected bv Temperature. By Lord Ray- 

 leigh, F.R.S \ 68 



On the Behaviour of the Becquerel and Rontgen Rays in a Magnetic 

 Field. By the Hon. R. J. Strutt, B.A., Scholar of Trinity College, 

 Cambridge. Communicated by Lord Rayleigh, F.R.S 75 



An Experimental Investigation of the Thermo-dynamical Properties of 

 Superheated Steam. By John H. Grindley, B.Sc, Wh. Sch., Exhibi- 

 tion (1851) Scholar, late Fellow of the Victoria LTniversity. Com- 

 municated by Professor Osborne Reynolds, F.R.S 79 



Researches in Absolute Mercurial Thermometry. By the late S. A. 

 Sworn, M.A. Communicated by H. B. Dixon. F.R.S. With Note by 

 Professor Schuster, F.R.S 86 



No. 426. 



Meeting of January 25, 1900, and List of Papers read 94 



On the Mechanism of Gelation in Reversible Colloidal Systems. By 

 W. B. Hardy, Fellow of Gonville and Caius College, Cambridge. 

 Communicated by F. H. Neville, F.R.S 95 



A Preliminary Investigation of the Conditions Avhich determine the 

 Stability of Iireversible Hydrosols. By W. B. Hardy, Fellow of 

 Gonville and Caius College, Cambridge. Communicated by F. H. 

 Neville, F.R.S 110 



The Piscian Stars. By Sir Norman Lockyer, K.C.B., F.R.S 126 



Mathematical Contributions to the Tlieory of Evolution. — On the Law 

 of Reversion. By Karl Pearson, F.R.S., University College, London 140 



No. 427. 



Meeting of February 1, 1900, and List of Papers read 165 



On the Effect i of Strain on the Thermo-electric Qualities of Metals. 

 Part II. By Magnus Maclean, M.A., D.Sc. Communicated by Lord 

 Kelvin, G.C. V".0., F.R.S , 165 



