Page 



Meeting of March 15, 1900, and List of Papers read 247 



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

 By Sir Norman Lockver, K.C.B., F.E.S., Captain Chisholm- Batten, 

 E.N., and Professor Pedler, F.E.S 247 



A Comparative Crystallographical Study of the Double Selenates of the 

 Series EoM(Se04).,6HoO.— Part I. Salts in which M is Zinc. By 

 A. E. Tutton, B.Sc., F.RS 248 



An Experimental Inquiry into ScurA y. By Frederick G. Jackson and 

 Vaughan Harley, M.D. Communicated by Lord Lister, P.E.S 250 



The Theory of the Double Gamma Function. B}^ E. "VV. Barnes, B.A., 

 Fellow of Trinity College, Cambridge. Communicated by Professor 

 A. E. Forsyth, Sc.D., F.E.S 265 



No. 429. 



Meetings of March 22 and March 29, 1900 268 



List of Papers read 269 



Thermal Radiation in Absolute Measure. By J. T. Bottomley, M.A., 

 D.Sc, F.E.S., and J. C. Beattie, D.Sc, F.E.S.E 269 



Photography of Sound-waves, and the Kinematographic Demonstia- 

 tion of the Evolutions of Eeflected Wave-fronts. By E. W. Wood, 

 Assistant Professor of Phvsics in the University of Wisconsin. Com- 

 municated by C. V. Boys, F.E.S 283 



Polytremacis and the Ancestry of HelioporidtiB. By Professor J. W. 

 Gregorv, D.Sc. Communicated by Professor Eay Lankester, F.E.S. 

 (Plate 2) 291 



On the Structure of Coccospheres and the Origin of Coccoliths. By 

 Henry H. Dixon, Sc.D., Assistant to the Professor of Botany, Trinity 

 College, Dublin. Communicated by J. Joly, F.E.S., Professor of 

 Geology, Trinity College, Dublin. (Plate 3) 305 



Data for the Problem of Evolution in Man. TV. Note on the EflFect 

 of Feitility depending on Homogamy. By Karl Pearson, F.E.S., 

 University College, London 316 



No. 430. 



Meeting of April 5, 1900 323 



List of Papers read 323 



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

 the AjDplication of certain Formula? in the Theory of Correlation to 

 tlie Inheritance of Chaiacters not capable of Quantitative Measui'e- 

 ment. By Kail Pearson, F.E.S., with the assistance of Miss Alice 

 Lee, D.Sc, University College, London 324 



On the Eetinal Currents of the Frog's Eye, excited by Light and excited 

 Electrically. By Augustus D. Waller, M.D., F.E.S 327 



Observ^ations on the Effect of Desiccation of Albumin upon its Coagu- 

 lability. By J. Bretland Farmer, M.A., Eoyal College of Science, 

 London. Communicated by Dr. H. T. Brown, F.E.S 329 



