PROCEEDINGS OF 

 THE ROYAL SOCIETY. 



vol, lxviii. No. 442. 



CONTENTS. 



PAGE 



Meeting of January 17, 1901, and Proceedings 1 



Mathematical Contributions to the Theory of Evolution. IX. — On the 

 Principle of Homotyposis and its Relation to Heredity, to the Variability 

 of the Individual, and to that of the R$ce. Part I. — Homotyposis in 

 the Vegetable Kingdom. By Kael Peabson, F.R.S., with the assist- 

 ance of Alice Lee, D.Sc, Eenest Waeben, D.Sc, Agnes Pet, Cicely 

 D. Fawcett, B.Sc, and others 1 



Total Eclipse of the Sun, January 22nd, 1898. Observations at Viziadrug. 

 Part IV. — The Prismatic Cameras. By Sir Jsoeman Loceyeb, K.C.B., 

 F.R.S. . . . . . . . . . , . . ■->«■ 6 



Wave-length Determinations and Greneral Results obtained from a Detailed 

 Examination of Spectra photographed at the Solar Eclipse of January 

 22, 1898. By J. Eyeeshed. Communicated by Dr. Bambattt, F.R.S. . 6 



The Thermo-chemistry of the Alloys of Copper and Zinc. By T. J. Bakee, 

 B.Sc, King Edward's School, Birmingham. Communicated by Professor 

 POYNTING, F.R.S 9 



A Chemical Study of the Phosphoric Acid and Potash Contents of the Wheat 

 Soils of Broadbalk Field, Rothamsted. By Bebnaed Dyee, D.Sc, F.I.C. 



Communicated by Sir J. Heney G-ilbeet, F.R.S 11 



Meeting of February 7, 1901, and Proceedings . . . . . .14 



List of Papers read 15 



Further Investigations on the Abnormal Outgrowths or Intumescences in 

 Hibiscus vitifolius, Linn. : a Study in Experimental Plant Pathology. 

 By Elizabeth Dale. Communicated by Professor H. Marshall Waed, 

 F.R.S. . . . ... . . . . . . . 16 



The Integration of the Equations of Propagation of Electric Waves. By 



A. E. H. Love, F.R.S 19 



On the Proteid Reaction of Adamkiewicz, with Contributions to the Chemistry 

 of G-lyoxylic Acid. By F. G-owland Hopkins, M.A., M.B., University 

 Lecturer in Chemical Physiology, and Sydney W. Cole, B.A., Trinity 

 College. (From the Physiological Laboratories, Cambridge.) Commu- 

 nicated by Dr. Langley, F.R.S 21 



For continuation of Contents see 2nd page of Wrapper. 



March 5, 1901. 



Price One Shilling and Sixpence. 



