386 Meteorological Observations at Burlington, Vt. 
inches less than in 1851. The whole amount of water between 
the 15th of April and the 3d of June, (7 weeks) was only 0:90 
in. The mean fall of water in May for the fourteen years pre- 
ceding 1852, was 3:07 in., and the smallest quantity in May in 
any one of those years was 1:55 inches, in 1842. The greatest 
fall of water in any one month, in the fifteen years ending with 
the year 1852, was 8°11 inches in October, 1850. 
The fall of snow in 1852 was 32 inches more than in 1851, 
and 5 inches less than in 1850. During the year there were 54 
days of tolerable sleighing in Burlington and vicinity, thirty-two 
days less than last year. The broad part of Lake Champlain, 
opposite Burlington, froze over January 18th, and broke up April 
19th, but was not clear of ice through its whole’ length till the 
3d of May, when the Line Boats commenced running. 
water of the lake was highest on the 12th of May, being then 1 
foot 8 inches below extreme high-water mark, and it was lowest 
on the 4th of October, being then 7 feet 9 inches below high- 
water mark—change of level of the lake in the year 6 ft. 1 inch. 
The extreme change of level has not been known to exe 
eight feet. 
Robins were seen the 16th, Blue Birds the 17th, and Song 
Cherries 20th, Siberian Crab-apple 23d, Pear 25th, Common Ap- 
ple 28th. The Summer Yellow Bird appeared the 5th, Balti- 
more Orioles the 7th, Bobolinks the 10th, and May Beetles 
2st of May. 
The Aurora Borealis was observed on 35 different evenings 
the course of the year, the most remarkable of which was on the 
19th of February. : 
he temperature of the water of Lake Champlain, at the 
depth of 125 feet, when the whole surface of the lake was ns 
ered with ice, was 344° on the Sth of April. "This was after the 
rivers flowing into the lake had broken up, and the temperature 
of the water where the examination was made, had doubtless 
‘been reduced by the ice-cold water brought in by the are 
The general temperature of the water of the lake, after ie 
had ota and the waters had been thoroughly agitate? ™) 
ds, was, 
the on the 23d of April, 363°. 
