S 



■m ■> „ 



111 



il 

 g'l 



Ji 



■130 



- 



■i«i5 ■• „ 

 ■in "„ 



Ji. 



■n:« 



:l-,ii-5nii 

 360 



■I'/o 





0447 



L'Sil 

 lllll- L'i'li 





30 



15 

 15 



30 



•0007 



•nciu 



«36~ 

 •0082 



2100 



2a jo 



30011 

 ~380tT 



750 



+ 



Fio. 1.— (Lithium Hvdr.ii>) 



Phil. Mag. Ser. 6, Vol. 27, PI. XL 



Fiq. 2.— (Litbiuiu Hydrate). 



,A 



•sll 



1}] 



II 



ill 



ll.s 



.i 















— 



15' 



•0175 



1000 



+ 















— 



15' 



■0045 



1950 



+ 











15' 



■0053 



2200 



" 



J„ Hp H y =Series lines "f hydrogen. 



=Seeondary spectrum of hjd 

 =Nitrogen 



Figs. 1-8 are enlarged about twice from the negatives ; Bg. 9 about three times. Slight curling of the pap;r has produced in some cases diffuse lines 



the detail is too poor to show some of the most interesting rariiitions in tlie spretra ; only ti r v striking v.-iriilions are indicated. 



Fjg. 7 (4, o) Bhould be compared with fig. 1 (a, 6, c) ; all these spectrograms were taken on the same plate and are from the same enlargement. 



olet portion, fig. 4 and fig. 7 (")■ Unfortunately 



