PROCEEDINGS OF 

 THE ROYAL SOCIETY. 



CONTENTS. 



PAGE 



The Third Elliptic Integral and the Ellipsotomic Problem. By A. Gr. 



G-reenhill, F.E.S. (Abstract) . . . . . . . 1 



On the Structure of the Palaeozoic Seed, Lagenostoma Lomaxi, with a State- 

 ment of the Evidence upon which it is referred to Lyginodendron. By- 

 Professor F. W. Olives and Dr. D. H. Scott, F.E.S. (Abstract). . 4 



Some Experiments in Magnetism. By T. C. Porter. Communicated by 



Lord Eayleigh, O.M., F.E.S. (Plate 1) ...... 5 



On the Distribution of Stress and Strain in the Cross-section of a Beam. 

 By John Moebow, M.Sc. (Vict.), Lecturer in Engineering, University 

 College, Bristol. Communicated by Professor Hele-Shaw, F.E.S. . 13 



Observations on the Sex of Mice. — Preliminary Paper. By S. Mottckton 



Copeman, M.A., M.D., F.E.S., and F. G-. Pabsons, F.E.C.S. p . . . 32 



Observations upon the Acquirement of Secondary Sexual Characters, indi- 

 cating the Formation of an Internal Secretion by the Testicle. By S. Gr. 

 Shattock and C. Gr. Seligmann. Communicated by Professor J. E. 

 Bbadeobd, F.E.S. 49 



The Morphology of the Eetrocalcarine Eegion of the Cortex Cerebri. By 

 Gr. Elliot Smith, M.A., M.D., Fellow of St. John's College, Cambridge, 

 Professor of Anatomy, Egyptian Grovernment School of Medicine, Cairo. 

 Communicated by Professor A. Macalistee, F.E.S 59 



On the Acoustic Shadow of a Sphere. By Loed Eayleigh, O.M., F.E.S. 

 With an Appendix, giving the Yalues of Legendre's Functions from 

 P to P 20 at Intervals of Five Degrees. By Professor A. Lodge. 

 (Abstract) 65 



Minutes of Meetings of January 21, 1904, and January 28, 1904 . . vii 



Price Two Shillings. 



February 11, 1904. 



