Quantity of Rain at Different Heights. 



497 



a colder region as they fall : thus increasing the quantity near the 

 surface. 



It may he observed that the difference is much increased by a 

 violent wind, but whether this is owing to the situations of the 

 gages or the different powers of condensation, has not been satis- 

 factorily determined. 



Observers in France and England conclude that the difference 

 in quantity, decreases in warm regions, and increases in cold. In 

 1834, there was much less difference in Paris, than at York, Eng- 

 land. So there may be less difference in daily than in nightly 

 periods. 



The conclusion arrived at by Mr. Harris is, that "the result de- 

 pended on two conditions : viz. The vertical measure of the tract 

 of air, intervening between the two stations, and the temperature 

 of the season of the year. The former determining the ratio of the 

 differences of the quantity of rain at different elevations above the 

 ground ; and the latter influencing the amount of these differences 

 — but the latter depends some upon the season of the year." 



The quantities of rain, and difference in quantity, with the ratios 

 of the quantities at three different stations, for three years, in dif- 

 ferent seasons, in York, England : viz. on York Minster, 212i£ 

 feet from the ground — on the museum 43 T 8 2 feet, and on the ground 

 from the same gentlemen are as follows : 



Minster. Museum. Ground. Difference. Ratios. 



6.833-2.876 66.35-85.83 



3.182-5.150 49.94-70.26 



10.874-4.790 64.82-84.50 



12.749-7.090 52.60-73.62 



13.717-6.231 64.42-83.84 



15.179-8.899 53.58-73.82 



The total results at the same place for 1833 and 1834, were : 



14.963 19.852 25.706 10.743-5 854 58.20-77.21 



At Bransby, 12 miles north, on a level with the Minster, it was 

 24.000 inches on the ground. 



At York, from Feb. 1st. 1834, to Jan. 31st 1835, the result of 

 the observations was : 



