MADE AT MARIETTA, OHIO. 



23 



For the examination of the march of the temperature about the beginning of 

 December, the following daily means (corrected for diurnal fluctuation) were 

 taken- from a series of 32 years. 



jvember 19 



. 39°.4 



November 27 . 



33°.8 



December 5 . 



35°.6 



20 



. 40.0 



28 . 



36.6 38.1 by formula 



6 . 



35.7 



21 



. 41.7 



29 . 



37.9 



7 . 



35.7 



" 22 



. 42.5 



" 30 . 



37.6 



" 8 . 



35.4 35.7 by formula 



23 



. 40.9 



December 1 . 



37.2 



9 . 



34.7 



24 



. 38.1 



« 2 . 



36.9 



« 10 . 



33.4 



" 25 



. 36.4 



" 3 . 



36.3 



. " 11 . 



33.8 



26 



. 35.9 



" 4 . 



3Q.0 



" . 12 . 

 " " 13 . 



32.4 

 33.8 



The annexed diagram (D) exhibits the daily means by a broken line, and the 

 n ea i temperature, computed by the formula T, by a smooth line passing through O. 



Diagram D. — Marietta, 0. , 



44° 



1 1 1 1 1 1 1 1 1 1 1 



1 1 1 1 1 1 1 ( 



I 1 1 ■ I -| 



( 



42 



y\ 







- 



40 



V ^^^^^^''^^^-X-.^ 







- 



38 

 36 



"^ / 



^^^^^^^^^^^^^~^~^^~~~— — ^ 





- 



34 



V 





^wT" 



~~? " 



32 



1 1 1 1 1 1 1 1 1 1 1 



\ ^ 1. 1 f 1 1 1 



1 r 1 1 



' f 



19 20 2122 23242526272829301 2345 6789 10111213 

 November. December. 



The Marietta observations, though indicating a normal temperature about Decem- 

 ber 3d, show a remarkable depression between November 25th and 28th, reaching 

 4° on the 27th ; this depression is preceded by an elevation reaching 2J° on the 22d. 



To verify the above, the observations taken at Brunswick, Me., during 51 years 

 were also examined with the following results : — 



November 19 



. 37°.4 



November 27 



. 33°.0 



December 5 



. 29°. 6 



" 20 



. 35.6 



28 



. 31.3 



6 



. 28.6 



" 21 



. 34.3 



29 



. 30.8 



7 



. 28.8 



" 22 



. 34.0 



30 



. 31.0 



8 



. 29.3 



" 23 



. 34.7 



December 1 



. 31.0 



9 



. 29.3 



" 24 



. 32.8 



2 



. 30.4 



" 10 



. 28.6 



25 



. 32.3 



3 



. 30.2 



11 



. 26.1 



26 



* . 32.5 



4 



. 29.8 



12 

 13 



. 25.5 

 . 24.5 







DiABKAM E. — Brunswick, Me. 







38° 











36 



-\ 







_ 



34 



\.^ 



-^\ ^. 





- 



32 



- 



•— ^\, 





- 



30 



- 







- 



28 

 26 



: 





\ 





24 



r 1 1 



1 1 1 1 1 1 1 1 1 1 1 1 r 1 1 1 1 



1 1 I 1 



"^'i 



192021222324252627282930 1 2 3 4 .5 6 7 8 9 10 11 12 13 

 November. December. 



These numbers when projected indicate no trace of an anomalous character, from 

 which it may be inferred with considerable probability that the Marietta inflexion 

 is of accidental orisrin. 



