348 



Mr. W. G. Rhodes. 



February 10, 1898. 



The LORD LISTER, F.R.C.S., D.C.L., President, in the Chair. 



A List of the Presents received was laid on the table, and thanks 

 ordered for them, 



The following Papers were read : — 



I. " Contributions to the Theory of Alternating Currents." By 

 W. Gr. Rhodes, M.Sc. (Vict.). Communicated by Arthur 

 Schuster, F.R.S. 



II. " The Development and Morphology of the Vascular System in 

 Mammals. I. The Posterior End of the Aorta and the Iliac 

 Arteries." By Alfred H. Young, M.B., F.R.C.S., and Arthur 

 Robinson, M.D. Communicated by Sir William Turner, 

 F.R.S. 



III. " Further Observations upon the Comparative Chemistry of 



the Suprarenal Capsules, with Remarks upon the Non- 

 existence of Suprarenal Medulla in Teleostean Fishes." By 

 B. Moore, M.A., Sharpey Scholar, University College, London, 

 and Swale Vincent, M.B. (Lond.), British Medical Associa- 

 tion Research Scholar. Communicated by Professor E. A. 

 Schafer, F.R.S. 



IV. " The Effects of Extirpation of the Suprarenal Bodies of the 



Eel (Anguilla anguilla)" By Swale Vincent, M.B. (Lond.), 

 British Medical Association Research Scholar. Communi- 

 cated by Professor E. A, Schafer, F.R.S. 



" Contributions to the Theory of Alternating Currents." By 

 W. G. Rhodes, M.Sc. (Vict.). Communicated by Arthur 

 Schuster, F.R.S. Received January 4, — Read February 

 10, 1898. 



(Abstract.) 



This paper is divided into two parts. Part I deals with a method 

 of finding the steady values of alternating currents in any circuits or 

 systems of circuits, without having to perform integrations of differ- 

 ential equations which may be somewhat complicated. 



It is assumed, however, that the electromotive forces and electric 



