22 



RESULTS OF METEOROLOGICAL OBSERVATIONS 





Observed. 



Computed. 



0-C. 





Observed. 



Computed. 



0— c. 



January .... 



31°.39 



31°.17 



4-0°.22 



July .... 



73". 19 



73°.25 



— 0°.06 



February 



34.16 



34.19 



—0.03 



August .... 



71.48 



71.69 



—0.21 



March .... 



42.66 



42.64 



—0.08 



September 



64.44 



63.94 



+0.50 



April .... 



53.60 



53.34 



+0.26 



October .... 



51.85 



52.44 



—0.59 



May .... 



62.50 



62.81 



—0.31 



November 



42.06 



41.51 



+0.56 



June .... 



69.86 



69.66 



+0.20 



December 



33.48 



33.96 



—0.48 



The probable error of the representation of any one monthly mean is ± 0°.27, 

 and that of the annual mean ± 0°.08. 



1 1 1 1 1 1 



1 II II 1 



/"X 







: / 



\ ; 



:/ 



\^ 



-J 



V.^ 



! 1 1 1 1 1 



1 1 1 1 1 1 



The temperature for the meteorological seasons is as follows: — 



Spring 52°.88 



Summer 71.51 



Autumn 52.78 



Winter 33.01 



Adding 1°.54 we find the annual mean temperature reduced to the level of the 

 sea = 54°.09 Fahr. 



Supposed Epochs of Irregularities in the Annual Variation. 



Various periods of apparent irregularities, so called hesitations, in the curve of 

 the mean annual temperature have been pointed out by meteorologists.^ Of these, 

 perhaps, those about the beginning of December, and about the middle of May are 

 the most conspicuous. The cause of such breaks in the march of the temperature 

 may either be local or cosmical ; if the latter, it must be felt in all parts of the 

 globe. 



' See Report of British Association for Advancement of Science; Birmingham Meeting, 1865; 

 also Herschel's Meteorology, p. 191. 



