:::tz; i 7i- :z::irv.i :; t; ; 



The discovery of this law releases him from further 

 investigation on the magnetic attraction in his engines. 

 He recognises ind the : inclusion of his paper is 



remarkable as showing how for he is as yet from appre- 

 heitibr the reixitest relttht be~eer. the _:-: /_.:.. hi= 

 tt-itine tt-y eertbrtt: tr.i the ; :u::t if -.Ttrk. the ctn- 

 rtr.t :.:.'. ::" zinc in the :^::tr it. i lIs; it. ... 7 tha.: 

 he sees r.: ier.c5etter.tti :c;ecti:z :: cercettiei zeititr 

 " I can hardly doubt," he says, " that electro-magnetism 



VV -j.ltirt5.teh.- be substituted :":r 5te-~ t: :::: : ":..:.; 

 If the po~-er the engine is in proportion to the attractive 

 f:rce ::' :t= lu^rr.eti. £.r.t : this -ttriiticr. : ti the sen -re 

 ::" the elettr h :hr:e the e:::t:ttty -.-ill be it the direct riii: 

 ::"the ::i:.:.:y :: electricity it the net :: "crkhtg the 

 etrize :=./ te recucec : ~ .:::<>■■:. It h ht~-evez yett: 



h: : r.e~ ezzize _ lie rex: : 

 titr. : :' the t tlrezdy zzezti : . 

 : e zzttzize :: hied he ^ 5 

 1 hzve beer, zzuth zletsed -.vie: 

 August joth, 1S39. 



There is thee - l::tg izterve 

 rxzerizzeztir t "dtic hh ezzize 



Mtrcz : :ch : :_: :r. Electee-: 

 it tte zzsc ir.5tLt.te t zirruv t 



the .s. :: tttrtititz ze :t: :.• 

 i. destrircitz :: the rxterizzeztf 

 t zzilisirhictl discussiir :: tl 

 frett advzzce =11 rzurc It. th 



Iz zzy zr 

 r zerrhrzz 



aids to follow 



it verht cz- 



t ; :' :.e 

 trv trizh 



T hlr 5 



.5 sevezzz 



