V 



On tlie Application of tlie Principle of Keciprocitj to Acoustics. By Lord 

 Ravleigli, F.K.S 118 



On Pliospliorus Pentafluoride. By T. E. Thorpe, F.R.S,; Professor of 

 Cli^B^I^B^e Yorkshire College of Science 122 



(flSlSriLated Saline Solutions. By J. G. Grenfell, B.A., F.G.S 124 



On some Elementary Principles in Animal Mechanics. — Xo. YIII. The 

 Law of Eatio-ue. By the Rev. Samuel Hauo:hton, M.D. (DiibL), B.C.L. 

 (Oxon.), F.R.S., Fellow of Trinity Colleg-e, Dublin 131 



On Repulsion resulting from Radiation. Influence of the Residual Gas. 

 — (Preliminary notice.) By William Crookes, F.R.S 136 



Xote on certain unusual Coagulation-appearances found in Mucus and other 

 Albuminoid Fluids. By Charles Creighton, M.B., M.A 140 



Determination of Verdet's Constant in Absolute Units. By J. E. H. 

 Gordon, B.A., Gonville and Caius College, Cambridge. — 1st and 2nd 

 Memoirs 144 



Contributions to Terrestrial Magnetism. — iS o. X V. By General Sir Edward 

 Sabine, R.A., K.C.B., F.R.S 148 



Researches illustratiye of the Physico- Chemical Theory of Fermentation, 

 and of the conditions fayouring Archebiosis in preyiously Boiled Fluids. — 

 No. I. By H. Charlton Bastian, M.A., M.D., F.R.S., Professor of Patho- 

 logical Anatomy in University College, London, and Physician to 

 University College Hospital 149 



On the Variations of the Daily Range of Atmospheric Temperatm'e as 

 recorded at the Kew Observatory. By Balfour Stewart, LL.D., F.R.S., 

 Professor of Natural Philosophy at Owens College, Manchester 156 



On the Leaf-arrangement of the Crowberry {Empetnnn niynwi). By 

 Hubert Airy, M.A., M.D 158 



Preliminary Note on the Use of the Piezometer in Deep-Sea Sounding. 

 By J. Y. Buchanan, Chemist to the ' Challenger ' Expedition 161 



On Organo-boron Compounds. By E. Frankland, D.C.L., F.R.S 165 



A Contribution to Ten-estrial Magnetism. By Yice-Admiral Sir Chas. 

 Shadwell, K.C.B., F.R.S 168 



Experiments on Contact Electricity between Non-Conductors. By Joseph 

 Thomson, Student at the Physical Laboratory of Owens College 169 



Physiological Action of the Bark of Erythrophleum guinense (Casca, Cassa, 

 or Sassy Bark). By T. Lauder Brimton, M.D., F.R.S., and Walter Pye, 

 M.R.C.S ...172 



Note on Independent Pulsation of the Pulmonaiy Veins and Vena Cava. By 

 T. Lauder Brunton, M.D., F.R.S., and Sir J. Fayrer, M.D., K.C.S.I. . . 174 



On certain Integrals. By W. H. L. Russell, F.R.S. 



176 



