39 



Ordinary Meeting, February 5th, 1861. 



J. C. Dyer, Esq., Vice-President, in the Chair. 



Mr. John Curtis communicated his observations of the 

 fall of rain in the years 1860, 1859, and 1858, and compared 

 them with Dr. Dalton's average for 47 years, and with ^e 

 mean of the last 72 and 75 years. The following is a sum- 

 mary of the results : — 



Average from 1794 to 1860 35-46 inches. 



from 1786 to 1857 36-398 „ 



„ from 1786 to 1860 30-274 „ 



Dalton's from 1794 to 1840 35-5-23 „ 



In 1858 30-53 



„ 1S69 33-09 



„ 1860 36-24 



Comparing the last year with 1859 it was found that 



The number of rainy days in 1860 were 28 days above that in 1859. 



The amount of evaporation „ vpas 092 inches below ,, 



The mean temperature ,, was 3-13 degrees below „ 



The highest temperature in shade „ was 9 7 degrees below ,, 



The lowest temperature in shade „ was 19*9 degrees below ,, 



The highest temperature in sun „ was 6*0 degrees below „ 



The lowest temperature on grass ,, was 19*9 degrees below „ 



The mean of barometer „ was 0031 inches below „ 



The number of days of snow ,, were 8 more than „ 



Dr. Crace Calvert stated that in consequence of having 

 found lead in snuif packed in leaden cases, he had examined 

 tea, chicory, &c., but without discovering lead in them, which 

 he attributed to the protection afforded, in some instances, by 

 the interposition of paper between the article and the leaden 

 case, and in others to the absence of sufficient moisture to 

 promote chemical action. 



Proceedings— Lit. & Phil. Society— No. 9.— Session, 1860-61. 



