260 Dr. Garnett's Arrangement 
lefs in winter than in fummer. The fact is fupported 
by the experiments of two fucceffive years, both of 
which Were favourable to the ifiquiry, becaufe little 
{row fell in either feafon ; but though it would be 
tafhine’s to maintain that the law is fairly eftablifhed, 
yét the following cireumiftances argue ftrongly for the 
ituth of it. ‘Thé mean height of the thermometer 
in wet weather; in winter, is nearly 46°. that is 89. 
above the freezing point: Now if we allow that 
the temperature diminithes half a degree with every 
200 feet of elevation, with Mr; Kirwan; the mean 
height of the point of congelation will be 1066 
yards, from which if we fubtract 320, the height of 
the hill, there remains 746 for the length of the 
column of air, that affords the rain collected by the 
upper gage in winter. On the other hand, the 
mean height of the thermometer in wet weather, in 
fummer, is about 54°. confequently, the length of 
the column that fupplies rain to the upper gage in 
the warmer part of the year, is 2613 yards, and the 
mean height of the point of congelation is 2933: but 
the ratio of 1066 to 746, is greater than that of 
2933 to 2613; and as no rain can be formed above 
the point of congelation, it follows from induction, 
that when the ratio of the columns that fupply the 
upper and lower gages is leaft; the quantities colle&ed 
by them will approach the neareft to equality, and 
the contrary. 
~ This inclination agrees well enough with the 
remarks in the rable: when a proper allowance is 
; made 
