208 



TENTH ANNUAL REPORT OF 

 TABLE No. 3. 



Observations for twenty-four successive hours, taken on the Idth of 



June, 1855. 



Remarks. — The mean temperature of the 22d, the period of our summer solstice, was 

 so much beyond the average, it is deemed best to record the hourly observations made 

 on the 19th, as most useful for purposes of comparison and correction. 



"The departure of the mean temperature of the 19th from that of the 22d June, 1854, 

 was 1.50 degrees mimes. The mean temperature of the corresponding day last year, (the 

 19th,) was the same as that of this year. 



The reading of the barometer varied only 0.01 inch from the average of three years 

 on the 22d .June. The wind of the corresponding day in 1854 i)re vailed from N.W., light ; 

 Bky clear. In 1853 the wind was fresh from the S., and sky more or less invested with 

 cirri-strati. 



[From the foregoing table, it appears that on this day the maxi- 

 mum temperature occurred at 3 p. m., and the minimum at 4 a. m. 

 The maximum of humidity was at 4 a. m., and the minimum at 3 

 p. m. ; and since the wind continued light during the day, these re- 

 sults are probably the same as those which would be obtained from 

 the observations during a number of days. The barometer exhibits 

 two maxima and two minima, but the points at which these occur are 

 not precisely marked.] 



