SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 52 



Table i. — Corrections to Wavc-Lcngths of Annals, ?"o!iunc I 

 (Corrections are stated in Angstroms, xvavc-lengths in microns.) 



Wave-lengths. 

 Corrections . . . 



1. 14 to end 

 



In further deterniination of wave-lengths, Mr. Freeman identified 

 81 deflections as corresponding each to each in the old and the new 

 bolometric work. These deflections covered fairly uniformly the range 

 from 0.76/^ to i.SOjU,. Having taken out from the tables of Volume I 

 of the Annals the corresponding wave-lengths, he then applied to these 

 values the corrections fixed by table i . He then plotted on a sufficiently 

 large scale the observed linear places of these 81 deflections as ordi- 

 nates, and the corrected wave-lengths as abscissae. The curves thus 

 defined could easily be read off to a single Angstrom. From them 

 were read all the wave-lengths given in table 3, which contains over 

 1200 lines. 



Table 2. — Circumstances of Observation 



]^ate 



1028 Curve 



Sept. 4 I 



2 



3 



Sept. 4 I 



2 



3 

 Sept. 5 I 



2 



3 

 Sept. I I 



2 



3 



Sept. 1 3 



2 

 I 



Time 



Air-mass 



Start 



9:39 

 10: 17 

 10: 52 

 6:28 

 7:59 

 8:51 

 6:34 

 9: II 

 9: 50 



6: 29 

 9: 19 

 9:58 

 3:34 

 2:58 

 i: 13 



Finish 

 10: 09 

 10:47 



II : 22 



6:58 

 8:29 



9: 21 

 7:04 

 9:41 



10: 20 

 6:59 

 9:49 



10:28 



3:54 

 3:28 



1:43 



Start 



I-3I 

 21 



15 



85 



97 

 54 

 49 

 43 

 28 

 70 

 36 

 24 

 82 



54 

 17 



Finish Notes 



1.23 



1. 16 

 I. 12 



3-23 

 1.69 

 1.38 

 3-05 

 I-3I 

 1.20 



3-15 

 1.27 



1. 17 



2.18 Ends off plate 

 1.76 



1-23 



Slight earthquake 



