/' ■ -y 



are many other causes of local d t it 



be understood that they are too slight to distort the 

 when we are only taking the main features of the 

 curve, as is shown in the exai- ' given. But it is 



! the minuter f the solar • va- 



are sought that these local distur are of 



,ame order nf ma crn nme especK- . . . 



n, the- lake a fuller m 



ularities o\ 

 e con. 



MUllbi. 



Ihe ler mus; eferred to pr 



rs for ar of th ns of overcoming these d 



^s, but that the ^ >f the 



achieved, it is rema. -. that enrh inf!< 



ivertible into a line 1 ^ ~ 



process of con 



, wha .11 our knowle 



;^een. Describing it ^.. ^ upon th' 



al spectrum '"- —"-■'" lulcu that '-^ "^^' 



ewton be unit 

 ould be represented by a li 



29 iM"..^ HT-tr/:a:j-avAV/ 



f-uiii^"-": 



