Ninth Annual Meeting. 



61 



winds of the first half of the year were much stronger than those of the second half. 

 The lightest winds were in July and August. 



BAROMETER. 

 Mean height of the barometer, 29.102 inches — precisely the same as in 1875. Mean 

 at 7 A. M., 29.126 inches; at 2 p. m., 29.079 inches; at 9 p. m., 29.100 inches. Maximum, 

 29.754 inches, on November 30th; minimum, 28.434; inche.s, on October 20th; yearly 

 range, 1.320 inches. The highest monthly mean was in December, 29.260 inches; the 

 lowest was in June, 29.010 inches. Tlie barometer observations are corrected for tem- 

 perature and instrumental error, but not for elevation. 



RELATIVE HUMIDITY. 



The average humidity of the air for the year was 66.8 ; at 7 A. M., 77.9 ; at 2 p. m., 

 48.08; at 9 p. m., 74.65. The dampest month was July — mean humidity, 78.6; the dryest 

 month was February, with mean humidity 59. There were only four fogs during the 

 year. The minimum humidity at any single observation was only 7.6 per cent., or about 

 one-thirteenth of saturation. 



The following tables give the mean temperature, the extremes of temperature, the 

 relative humidity, and the rainfall for each month of the year 1876, and a comparison 

 with preceding years : 



Months 



January.... 

 February.. 



March 



April 



May 



June 



July 



August 



September 



October 



November. 

 Pecember. 



2 



—5 

 

 30 

 39 

 50 

 60 

 63 

 34 

 25 

 9 



—5 





68.4 

 59.0 

 69.4 

 59.6 

 64.5 

 68.6 

 72.7 

 72.4 

 68.6 

 59.8 

 70.9 

 68.9 



0..'57 

 0.36 

 4.51 

 3.38 

 6.75 

 12.11 

 3.51 

 4.45 

 3.58 

 1.93 

 2.60 

 0.43 



& 



2^. 



3>S o 



0.72t 

 0.58t 

 2.34* 

 0.46* 

 3.09* 

 8.. 54* 

 1.32t 

 0.23* 

 0.18* 

 0.41t 

 0.88* 

 1.47t 



COMPARISON WITH PREVIOUS YEARS. 



* Excess. + Deficiency. 



