METEOROLOGICAL OBSERVATIONS. 135 
‘The greateft height of the barometer this year, was on 
the 17th of November: The mercury was then at 30.53 
inches. ‘The leaft height was 28.2} inches on Auguft the 
26th. The thermometer on the 29th of July, rofe to 
96°; on February the 13th, it ftood at 3°: The former 
was the greateft, the latter its leaft height. The quantity 
of rain that fell in the year was 36.30 inches. The 
quantity of evaporation, meafured by filling the veffel 
once a week, came out 42.65 inches. 
It is however to be obferved that different methods of 
meafuring the evaporation, will lead to different conclufi- 
ons. It was becaufe the tube was of too {mall a diameter, 
and not filled often enough, that the quantity of evapora- 
tion came out fo fmallin 1771. The method of making 
the experiments being altered, the evaporation turns out 
very different in 1772. Ifthe experiments could be made 
on the furface of a watery fluid the refult would determine 
the quantity of evaporation, with much greater certainty 
and accuracy, than can ever be done by means of a veflel 
fufpended in the air. 
OBSERVATIONS in 1773. 
‘The quantity of rain which fell in © 
January, was 1595 
February, 0:95 
“March, 1,75 
April, 1,9° 
May, 2,10 
June, 1,70 
July, 1,00 
Auguft, 4515 
September, 1,05 
October, 4,10 
November, 1,90 
December, 4,00 
