103 MR. H. WILDE ON A PROPERTY OF 



senses^ of the reality of whicli^ whether we can communi- 

 cate with it directly or not (and of this he never seemed 

 quite sure) he was firmly convinced. Those who remain 

 to lament his loss, and who share the same belief, may 

 unite in the fervent trust that in the world of which he 

 thought much, but spoke little, his spirit may have found 

 not merely rest and satisfaction, but also a continuance 

 of that mental activity and development which to him 

 were life. 



Dr. Smith was never married, but for many years his 

 niece. Miss Jessie Knox Smith, was his constant com- 

 panion and confidante, ministering to him with a zeal 

 and devotion which could not have been exceeded had the 

 relationship been that of father and daughter. 



VII. On a Property of the Magneto-electric Current to 

 control and render Synchronous the Rotations of the 

 Armatures of a number of Electro-magnetic Induction- 

 machines, By Henry Wilde, Esq.* 



Read December 15th, 1868. 



The discovery of the property which I am about to describe 

 arose out of the eff'orts which have been made, during the 

 last two years, to redace the internal heat generated in an 

 electro-magnetic machine by the induction- currents set up 

 in the electro-magnet and armature by the rapid magnet- 

 ization and demagnetization of the latter. This heating 

 of the armature, as is well known, was first observed by 



* The subjects treated of in this and the two following papers haying 

 acquired great interest in recent years, it is believed that the papers would 

 be increasingly useful if they were embodied in the more permanent records 

 of the Society. 



