V 



April 12, 1883. 



Page 



The Principal Cause of the Large Errors at present existing between the 

 Positions of the Moon deduced from Hansen's Tables and Observation : 

 and the Cause of an Apparent Increase in the Secular Acceleration in 

 the Moon's Mean Motion required by Hansen's Tables or of an Appa- 



rent Change in the Time of the Earth's Rotation. By E. J. Stone, 

 F.E.S., Director of the Kadcliffe Observatory, Oxford 135 



On the Atomic Weight of Glucinum (Beryllium). By T. S. Humpidge, 

 Ph.D., B.Sc 137 



On a New Crinoid from the Southern Sea. By P. Herbert Carpenter, 

 M.A., Assistant Master at Eton College 138 



On the Structure and Functions of the Eyes of Arthropoda. By B. 

 Thompson Lowne, F.R.C.S., Lecturer on Physiology in the Middlesex 

 Hospital Medical School, Examiner in Physiology in the Royal College 

 of Surgeons, formerly Arris and Gale Lecturer on Anatomy and Phy- 

 siology in the Royal College of Surgeons 140 



Introductory Note on Communications to be presented on the Physiology 

 of the Carbohydrates in the Animal System. By F. W. Pavy, M.D., 

 F.R.S 145 



April 19, 1883. 



Measurements of the Wave-lengths of Rays of High Refrangibility in 

 the Spectra of Elementary Substances. By W. N. Hartley, F.R.S. E., 

 &c, Professor of Chemistry, Royal College of Science, Dublin, and 

 W. E. Adeney, F.C.S., Associate of the Royal College of Science 148 



On the Limiting Thickness of Liquid Films. By A. W. Reinold, M.A., 

 Professor of Physics in the Royal Naval College, Greenwich, and A. 

 W. Riicker, M.A., Professor of Physics in the Yorkshire College, Leeds 149 



On the Total Solar Eclipse of Mav 17, 1882. By Arthur Schuster, Ph.D., 

 F.R.S., and Captain W. de W. Abney, R.E., F.R.S 151 



Note on Syringammina, a New Type of Arenaceous Rhizopoda. By 

 Henry B. Brady, F.R.S. (Plates 2, 3) 155 



April 26, 1883. 



Contributions to the Chemistry of Food. By James Bell, Ph.D., F.C.S... 161 



Pelvic Characters of Thylacoleo camifex. By Professor Owen, C.B., 

 F.R.S., Director of the Natural History Department, British Museum 163 



On the Continuity of the Protoplasm through the Walls of Vegetable 

 Cells. By Walter Gardiner, B.A., late Scholar of Clare College, Cam- 



bridge 163 



On the Dependence of Radiation on Temperature. By Sir William 

 Siemens, F.R.S., D.C.L., LL.D 166 



May 10, 1883. 



List of Candidates for Election 1 78 



