JOSEPH IIENRV 7 



of Faraday, the latter was tlu' first to make known his ohserxatioiis 

 to the world, and it is no trilling- index of Henry's charaeler that he 

 never in any way intimated that he was entitled to share with I'araday 

 credit for the discovery. 



Because Henry was anticipated in the publication of his observation 

 of mutual induction, he does not appear to have left a verbal record 

 of the steps of reasoning by which he was led to the disco\-ery. How- 

 ever, he does tell us what the arrangement o{ apparatus was and il 

 we bear in mind that he was seeking a method of generating an electric 

 current from a magnet — this magnet, in turn, l)eing itselt the i)roduct 



Fig. 2 



of a current — we cannot but be impressed by the directness of his 

 method. 



Writing of his original observations, Henry says he "succeeded in 

 producing electrical effects in the following manner, wdiich dififers 



