170 



Mr. W. F. Sheppard. On the Geometrical 



II. " Mathematical Contributions to the Theory of Evolution. 

 IV. On the probable Errors of Frequency Constants and 

 on the Influence of Random Selection on Variation and 

 Correlation." By Karl Pearson, M.A., F.R.S., Professor 

 of Mathematics and Mechanics, University College, London, 

 and L. N. a. Filon, B.A.. 



III. " On certain Media for the Cultivation of the Bacillus of 



Tubercle." By Arthur Ransome, M.D., F.R.S. 



IV. " Further Note on the Transplantation and Growth of Mam- 



malian Ova within a Uterine Foster-mother." By Walter 

 Heape, M.A., Trinity College, Cambridge. Communicated 

 by Dr. W. H. Gaskell, F.R.S. 



V. £! Further Observations upon the Comparative Physiology of 

 the Suprarenal Capsules." By Swale Vincent, M.B. 

 (Lond.), British Medical Association Research Scholar. 

 Communicated by E. A. Schafer, F.R.S. 



VI. " Summary of Professor Edgreworfch David's Preliminary 

 Report on the Boring at Funafuti." By T. G. Bonnet, 

 D.Sc, LL.D. (Univ. McGill), F.R.S., Professor of Geology 

 in University College, London. 



VII. " On the Determination of the Indices of Refraction of various 

 Substances for the Electric Ray. II. Index of Refraction 

 of Glass." By Jagadts Chunder Bose, M.A., D.Sc, Pro- 

 fessor of Physical Science, Presidency College, Calcutta. 

 Communicated by Lord Ratleigh, F.R.S. 



VIII. " On the Influence of the Thickness of Air-space on Total 

 Reflection of Electric Radiation." By Jagadis Chunder 

 Bose, M.A., D.Sc, Professor of Physical Science, Presi- 

 dency College, Calcutta. Communicated by Lord Ratleigh, 

 F.R.S. 



'On the Geometrical Treatment of the 'Normal Curve' of 

 Statistics, with especial Reference to Correlation and to 

 the Theory of Error." By W. F. Sheppard, M.A., LL.M., 

 formerly Fellow of Trinity College. Cambridge. Commu- 

 nicated by Professor A. R. Forsyth, F.R.S. Received 

 October 9,— Read November 25, 1897. 



(Abstract.) 



The object of the paper is, in the first place, to simplify and 

 extend the treatment of normal correlation as expounded by Francis 

 Galton and Karl Pearson ; and in the second place to obtain general 



