300 Miss Marian Baxter on the Dispersion 



Nos. 1 and 2. Range 4058-5600. 



2e 2 = -39181 Ze/\ = --65889 



Sef= -21-241 



2/ 2 = 4704'39 



S//X= 52-834 

 2l/\ 2 ^ 1-30447. 









2e». 



2/». 



2n/\. 





1 





- 8-2104 



398-47 



13-5600 





o 





-14-1151 



596-46 



229598 



Nos 



.3 



-8. 



Range 4090- 



5200. 









S^ 2 



= -20954 



2e/\ 



= -•40782 







&/ 



= -6-860 



2//A 



= 16-375 







2/ 2 



= 483-16 



Sl'/A 



2 = -84588. 









Sew. 



2/n. 



Sn//. 





3 





-11-6182 



362 00 



22-410 





4 





-120343 



34385 



22-729 





5 





-12-8871 



290-66 



23-1638 





6 





-14-9167 



282-19 



25-9572 





7 





-24-4953 



499-98 



43-2382 





8 





-28-8089 



444-32 



48-7668 









a y 



a a . 



A. aja z . 



l 







- 21-94 



-•01219 - 



•1930 1881 



2 







- 38-154 



-•04901 + 



•3141 778-5 



3 







- 56-59 



- -07983 + 



•7550 708-8 



4 







- 73-71 



— •11961 - 



6-3517 616-25 



5 







-114-51 



-•23629 



23-255 484'6 



6 







-159-07 



-•33520 



39-515 474-6 



7 







-239-38 



- -53766 



53-886 445-6 



8 







-337-43 



-•90611 



87-496 372-4 



From fig. 1 it is seen that the calculated values of n for 

 photograph 3 lie off the curve for wave-lengths higher than 

 5200; from the position of these points it appears probable 



