Contents. 
Vll 
PAGE 
On the Effect of Internal Friction in Cases of Compound Stress. By G. H. Gulliver, 
B.Sc., A.M.I.Mech.E., Lecturer in Engineering in the University of Edinburgh. 
Issued separately July 9, 1909, ....... 427 
On the Friction at the Extremities of a Short Bar subjected to a Crushing Load, and 
its Influence upon the Apparent Compressive Strength of the Material. By 
G. H. Gulliver, B.Sc., A.M.I.Mech.E., Lecturer in Engineering in the University 
of Edinburgh. Issued separately July 16, 1909, ..... 432 
On Group-Velocity and on the Propagation of Waves in a Dispersive Medium. By 
George Green, M.A., B.Sc., Assistant to the Professor of Natural Philosophy 
in the University of Glasgow. Communicated by Professor A. Gray, F.R.S. 
Issued separately July 16, 1909, ....... 445 
On a Simple Radioscope and a Radiometer for showing and measuring Radio- 
activity. By Dr John Aitken, F.R.S. Issued separately July 21, 1909, . 471 
Nematonurus Lecointei, Poisson abyssal de la “Belgica” retrouve par l’Expedition 
Antarctique Nationale Ecossaise. Note preliminaire, par Louis Dollo, ScD. 
(Cantab.), Ph D. (Giessen), Min. et Geol. D. (Utrecht), a Bruxelles (Musee). 
Presentee par M. R. H. Traquair, M.D., LL.D., F.R.S., V.P.R.S.E. Issued 
separately August 5, 1909, ....... 488 
The Theory of Jacobians in the Historical Order of Development up to 1860. By 
Thomas Muir, LL.D. Issued separately August 6, 1909, . . . 499 
Motion of Neptune’s Satellite. By David Gibb, M.A., B.Sc. Communicated by 
Professor Dyson. Issued separately August 23, 1909, . . . .517 
The Pathogenesis of Micrococcus melitensis. By J. Eyre, M.D., Bacteriologist to 
Guy’s Hospital, Member Advisory Board of Mediterranean Fever Commission, 
and Chairman of the 1906 Working Party in Malta. Issued separately 
September 7, 1909, . . . . . . . 537 
The Development of the Auditory Ossicles in the Horse, with a Note on their 
possible Homologues in the Lower Vertebrata. By Ray F. Coyle, B.S. ( From 
the Zoological Department of the University of Edinburgh.) Communicated by 
Professor J. C. Ewart, M.D., F.R.S. (With Six Plates.) Issued separately 
September 9, 1909, ........ 582 
Dr O. Pettersson’s Observations on Deep Water Oscillations. By E. M. Wedderburn, 
W.S. (With a Plate.) Issued separately August 14, 1909, . . . 602 
Mendelian Action on Differentiated Sex. By D. Berry Hart, M.D., F.R.C.P.E., 
Lecturer on Midwifery, Surgeons’ Hall, Edinburgh ; Carnegie Research Fellow. 
{From the Laboratory of the Royal College of Physicians.) (Abstract.) Issued 
separately September 29, 1909, ....... 607 
Observations with a Current Meter in Loch Ness. By E. M. Wedderburn, W.S., 
and W. Watson, M.A., B.Sc. Issued separately October 1, 1909, . . 619 
Hydrolysis of Salts of Amphoteric Electrolytes. By Miss Heather Henderson 
Beveridge, B.Sc., Carnegie Research Scholar. Communicated by Professor James 
Walker. Issued separately October 14, 1909, ..... 648 
The Superadjugate Determinant and Skew Determinants having a Univarial 
Diagonal. By Thomas Muir, LL.D. Issued separately October 15, 1909, 
668 
