NO. 12 



SMITHSONIAN EXPLORATIONS, I917 



27 



Cloudiness was nearly continuous until October, and though no doubt 

 this season was exceptionally bad, yet, even in the long stretch of fine 

 weather of October and November, the values obtained were fre- 

 quently ruined by changes of the atmospheric transparency. It is 



Fig. 25. — Observatory and cook-house, 

 Hump Mountain, N. C. 



> V-. 



^4 



Fig. 26. — L. H. Abliot observing 

 sky-radiation. 



expected that results of special value will occasionally be obtained 

 in the winter, owing to the low temperature and low humidity then 

 prevailing, but there is no encouragement to continue the observatory 

 for a term of years. 



