1 64 THE ADDRESSES, LECTURES, ETC., OF 



contrary direction to the motion that would be imparted to it by 

 the current, and in trying the experiment we were startled by the 

 fact that a considerable current was the immediate result of 

 imparting such motion. 



Immediately after obtaining this result my brother invited 

 Professors Dove, Magnus, Du Bois Reymond, and several other 

 of the leading physicists of Berlin, to witness in our presence 

 these striking results. This inspection took place before Christmas, 

 186G, and therefore previous to the date of Mr. Yarley's provisional 

 specification, and a little time naturally elapsed before my brother 

 and myself prepared our respective papers for the Berlin Academy 

 of Sciences and the Royal Society. 



I have the highest regard for Mr. Varley's ingenuity, but think 

 that in the present instance he has really been anticipated in the 

 discovery of the principle which seems destined to be productive 

 of important practical results. 



I am, Sir, yours faithfully, 



C. WILLIAM SIEMENS. 



12, QUEEN ANNE'S GATE, October 30, 1877. 



To THE EDITOR OF " ENGINEERING." 



SIR, The two letters appearing in your issues of the 2nd and 

 9th inst., both signed S. Alfred Varley, call for a few remarks on 

 my part in reply. 



It is of course impossible for me to say when the idea of 

 the magneto-electro reaction principle may have occurred to 

 Mr. S. Alfred Varley, and possibly to others before him, but I do 

 not see in his observations any good reason to alter the view to 

 which I have given expression in my letter to you of the 20th ult., 

 in assigning the merit of having first publicly enunciated the 

 principle in question to my brother, Dr. Werner Siemens. 



I am sorry to have given offence to Mr. S. Alfred Yarley in 

 referring to his letter of the 22nd ult. as that of Mr. C. Varley, a 

 mistake which arose from the circumstance that in the provisional 

 specification referred to in that letter the name of Mr. C. Varley 

 stands first. It seems somewhat surprising under these circum- 



