RAMJLT1 



irresistibly infers tint the appearance of tbe colors corre- 

 sponds to certain c onte mporaneous changes in tie wire. 



'-■-. 

 condition does the wire radiate at aO * We must noir 

 look from the wire as a whole to its constituent atoms. 

 see those atoms, even before the electric current 

 has begun to act upon them, ire should find them in a 

 state of vibration. In this vibration, indeed, consists such 

 warmth as the wire then po~ Locke enunciated this 



idea with great precision, and it seems placed beyond the 

 pale of doubt bj the excellent quantita: -marches of 



Joule. - very brisk agitation 



the insensible parts of the object, which produce in us 

 that sensation from which we denominate the object a 

 so what in our sensation is keat in the object is nothing 

 • ..: ;.-•:.'. .." "Wr.er. :hv e"v-;:ri; ;-.:rr -.--.-.:. >:i.. :V-;V".-.\ ":v-_: - 

 pass through the wi? , its orst act is to intensify the 

 vibrations ahead causing the atoms - ing 



: ■ : - - •-".:. ::.: " . - 



: ".s ;:' :::•; .•>:....:: -.5 ..re i:..r-.v.>;-.L T:.e ;..r:\..: . : ..\-> 

 this, L .bout altering the periods of the old vi- 



brations, or the times in which th But 



-ides it. iag the old vibrations the curr i er- 



s new and more rapid ones, and when a certain den: 



- v>en attained the wir gins tog Ibe 



color first exhibited - vhich corresponds 



ogniEu. 

 _ - _ current mm 



introduced, and orange rays apfv 

 A \ vibration produces veD. :iHquk 



: and b gmeating 



through b"... g . and violet, to th; 



_ - 



sua! cr : - 



