Contents. 
Vll 
On the Application of a Differential Densimeter to the Study of some Mediterranean 
Waters. By Jonn J. Manley, M.A., Daubeny Curator, Magdalen College, 
Oxford. Communicated by Sir John Murray, K.C.B. With an Appendix. 
Issued separately September 11, 1907, ...... 
The Electric Conductivity and. Refracting Power of Ninety Samples of Sea- Water, 
and a Comparison of these with the Salinity and Density. By E. G. Hill, 
B.A. Oxon., D.Sc. Dublin, Professor of Chemistry, Muir College, Allahabad. Com- 
municated by Sir John Murray, K.C.B. Issued separately September 11, 1907, . 
The Influence of Twist on the Strength of a Thread. By Thomas Oliver, B.Sc. 
(Bond, and Edin.), Carnegie Research Fellow. Communicated by Dr C. G. Knott. 
Issued separately October 2, 1907, ...... 
A New Method of determining the Degree of Twist in Single Threads. By Thomas 
Oliver, B.Sc. (Bond, and Edin.), Carnegie Research Fellow. Communicated by 
Dr C. G. Knott. Issued separately October 2, 1907, .... 
The Composition of Terrigenous Deposits. By F. W. Clarke, D.Sc., BB.D., Chief 
Chemist, IBS. Geological Survey. Communicated by Sir John Murray, K.C.B., 
F.R.S., etc. Issued separately October 2, 1907, ..... 
A Preliminary Note on the Optical Rotations (throughout the Spectrum), the 
Electrical Conductivities, and the Densities of Mixtures of Sodium- Potassium- 
Tartarate and Ammonium- Molybdate in Aqueous Solution. By James Robert 
Milne, D.Sc., Carnegie Research Fellow in Physics. Issued separately October 
3, 1907, 
Degenerations following Experimental Besions In the Motor Cortex of the Monkey. 
By Sutherland Simpson, M.D., D.Sc., and W. A. Jolly, M.B. ( From the Physio- 
logical Laboratory , University of Edinburgh.) Communicated by Professor A. E. 
Schafer, F.R.S. Issued separately October 3, 1907, .... 
Hydrachnidee collected by the Bake Survey. By Mr Wm. Williamson. Communi- 
cated by Sir John Murray, K.C.B. Issued separately October 3, 1907, . 
Precipitated Sulphur. By Alexander Smith and R. H. Brownlee. Issued sepa- 
rately October 3, 1907, ........ 
A specimen of Helix pomatia with Paired Male Organs. By J. H. Ashworth, D.Sc., 
Becturer in Invertebrate Zoology in the University of Edinburgh. Communi- 
cated by Professor J. C. Ewart, M.D., F.R.S. (With Plate, and Two Figures 
in the Text.) Issued separately October 4, 1907, .... 
A Sketch of Japanese National Development, more especially with reference to 
Education. By Baron Kikuchi, M.A., D.Sc., BB.D., Emeritus Professor of 
Mathematics in the Imperial University of Japan (ex-Minister of Education, 
and formerly President of the Imperial University). Issued separately 
October 5, 1907, ......... 
The Variation of Young’s Modulus under an Electric Current. By Henry Walker, 
M.A., B.Sc. Communicated by Professor J. G. MacGregor, F.R.S. Issued sepa- 
rately October 7, 1907, ........ 
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