27 







RATIOS 









D, = 1 







M 



A 



A-M 



B 



1.16490 



1.16485 



-.00005 



C 



,1.11312 



1.11313 



.00001 



Dl 



1. 



1. 







D, 



.998963 



.998965 







E 



.S93S64 



.893882 



.000018 



h 



.870].-)! 



.879212 



.000061 



h. 



.877297 



.877355 



.000058 



h 



.876662 



.870731 



.000UG9 



K 



.876396 



.876460 



.000064 



F 



.824485 



.824526 



.000041 



G 



.730679 



.730640 



.000061 



The agreement here is sufficiently close, it seems to me, to justify the 

 assertion that any other wave-length measurements that difter widely nv irreg- 

 ularly from these must be incorrect. 



