692 Prof. McLennan and Mr. Dearie on the Infra-red 



Table I. 



Authors : 



I. 



Paschen. 



I. 



Lehmann. 



I. 



Moll. 



Coblentz 

 and G-eer. 



Frequency 

 in vacuo. 



/' 





P 





M 





H- 



H- 





302 



6 













3-00 (?) 



3310-3 

 3332-4 



1-72 



*5 



::: 



1-711 

 1-707 



1-694 

 1-692 

 1-529 



4 



5 



2-8 



4-6 



9 







1-70 

 1 : 52 





5812-4 

 5843-1 

 5856-9 

 5880-8 

 5900-8 

 5908-6 

 6514-4 

 6577*1 



1-483 



"3 



1-395 



6*5 



1-464 



4 





::: 



6668-3 

 6828-5 

 7166-0 



1-377 



"8 



1-367 

 1-357 



17 

 12 



1-369 

 1*869 



2 

 2 





.": 



7260-6 

 7300-2 

 7311-3 



7352-2 

 7366-7 



1-329 



'}. 













1-285 



7522-4 



7778-4 



1-270 



... 



1-207 



2-6 











7871-8 

 8282-2 



1-205 



2 



1-202 

 1-188 



2-4 



2-6 











8286-6 

 8316-4 

 8410-3 



l : i*70 



■7 



1-129 



31 











8544-9 



8826-5 



1 : 128 



9 







l : i*28 ; 



*3 







8863-0 



1-090 



5 















9171-7 



1067 



7 

 ... 













1-045 



9369-7 

 9567-2 



1-038 



6 







1-015 



1 







9631-4 

 9851-2 



1-014 



30 



1-014 



71 











9863-5 



the lines nearest to 1*329/* are that noted by Paschen at 

 1*351 /* and that given by Coblentz and Geer at 1*285. The 

 line at 1*270/* appears to be a new one, unless it be the 

 same as that given by Coblentz and Greer at 1*285 /*. That 

 at 1*205 /* very likely represents a combination of the lines 

 given by Paschen at 1*207 /* and 1*202 /*. The line at 

 1*170/* probably represents the same one as Paschen's at 

 1*188 /*. The maximum observed at 1*128 /* was also found 

 by Paschen and Lehmann, but the maxima at 1*090 /* and 

 1*067/* are new. As mentioned before, the maxima at 

 1*038/* and 1*045/* probably refer to the same line. The 

 line at 1*014/* was also observed by Paschen and by Lehmann 

 at 1*015/*. 



An energy curve showing the maximum at 3*02 /* is given 



