PROCEEDINGS OF 

 THE ROYAL SOCIETY. 



VOL. LXXIIL No. 490. 



CONTENTS. 



PAGE 



A New Method of Detecting Electrical Oscillations. By J. A. Ewing, 



LL.D., F.R.S., and L. H. Waltee, M.A 120 



Constant-standard Silver Trial-Plates. By Edwasd Matthet, C.B., F.S.A., 

 F.C.S., Assoc. Eoy. Sch. Mines. Communicated by Sir William 

 Cbookes, F.R.S ... 124 



Further Observations on the Role of the Blood Fluids in connection with 

 Phagocytosis. By A. E. Weight, M.D., late Professor of Pathology, 

 Army Medical School, Netley, Pathologist to St. Mary's Hospital, W., 

 and Stewaet R. Douglas, M.R.C.S., Captain, Indian Medical Service. 

 Communicated by Sir J. Btjbdon Sandebson, F.R.S. (Plate 3) . . 128 



Sunspot "Variation in Latitude, 1861 — 1902. By William J. S. Lockyeb, 

 M.A. (Camb.), Ph.D. (Ghott.), F.R.A.S., Chief Assistant, Solar Physics 

 Observatory. Communicated by Sir Noeman Lockyee, K.C.B., LL.D., 

 F.R.S. (Plates 4 and 5) . . 142 



On the Compressibilities of Oxygen, Hydrogen, Nitrogen, and Carbonic 

 Oxide between One Atmosphere and Half an Atmosphere of Pressure, 

 and on the Atomic Weights of the Elements concerned. — Preliminary 

 Notice. By Loed Rayleigh, O.M., F.R.S 153 



Theory of Amphoteric Electrolytes. By Professor James Walkeb, F.R.S., 



University College, Dundee . . . . . . . 155 



Minutes of Meetings of February 18, 1904, and February 25, 1904 . . xii 



MAR 17 1904 



Price Two Shillings and Sixpence. 



March 7, 1904. 



