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Fig. 1. 



facsimile reproductions of five traces of the self-recording instruments at Winter Quarters, representing rapid 

 11 actuations of temperature and one associated barometric trace. 



No. 1. Thermograph record of temperatures above and below zero. September 8 to 14, 190:2. 

 2. below zero F. April G to 12, 1903. 



3. lK!,w-10F. June 9 to 15, 1002. 



4. between -50 J F. and 5 F. June 22 to 28, 1903. 



5. Barograph record for comparison, allowing the iib.sence of any noteworthy change uf pressure to 

 i mrespniid with rhanges of temperature. 



& 2 



