Vlll 



April 24, 1890. 



Psige 



On a Pneumatic Analogue of the Wheatstone Bridge. By W. N. Shaw, 

 M. A., Lecturer in Physics in the University of Cambridge 462 



On the Effect of Tension upon Magnetic Changes of Length in Wires of 

 Iron, Nickel, and Cobalt. By Shelford Bidwell, M.A., F.E.S 469 



On the Heat of the Moon and Stars. By C. Y. Boys, A.E.S.M., F.E.S., 

 Assistant Professor of Physics, Normal School of Science, and Eoyal 

 School of Mines, London 480 



Observations on the Secretion of Bile in a case of Biliary Fistula. By 

 A. W. Mayo Eobson, F.E.C.S., Hon. Surgeon, Leeds General Infirmary, 

 Lecturer on Practical Surgery at the Yorkshire College, and Examiner 

 in the Victoria University 499 



List of Presents '. 524 



Bakerian Lecture. — The Discharge of Electricity through Gases. (Pre- 

 liminary Communication.) By Arthur Schuster, F.E.S 526 



Obituary Notices : — 



Eobert Hunt i 



Eobert Cornelis, Lord Napier of Magdala ji 



Dr. Cobbold . i v 



John Ball , v 



The Eev. Miles Joseph Berkeley, M.A., F.L.S ix 



Sir Eobert John Kane, LL.D. xii 



Index xix 



