6 
REPOET OF 
RESULTS OF OBSERVATIONS 
ON THE 
OSCILLATION OF THE BAROMETER, 
At several hours, between 4 a. m. and 10 p. m. at A'ork, in 
N. Lat. 53° 56', 35 feet above high-water. 
1st, The height at 4 p. m. being taken as the standard. 
A. M. 
P. M 
r 
4 
8 
1 ^ 
9 4 
9 
10 
+ 
-H 
-f- 
+ 
•0075 
•0163 
•017s standard 
0 
0 
• 
•0162 
2d, The mean of the heights at 9 a. m., and 4 p. m. being taken 
as the standard. 
A. M. 
P. M. 
A 
r ' 
4 
8 
1 
9 
r 
4 
9 
10 
— 
+ 
+ 
— 
+ 
-h 
•0013 
•0074 
•0089 
*0089 
•0081 
•0073 
The researches of Professor Forbes, (Trans, of the Royal Society 
of Edinburgh, 1831,) and those of Mr. Hudson, (Philosophical 
Transactions, 1832,) afford the means of comparing these results 
with those obtained in London, and in Edinburgh. Mr. Hudson 
states the oscillation from 10 a. m. to 4 p. m. in London, Lat* 
50*^ 51', 95 feet above the sea, at *028. Mr. Forbes has determined 
the same in Edinburgh, Lat. 55° 55', 430 feet above the sea, to be 
•0114. According to the formula of Professor Forbes, this oscilla¬ 
tion should be at York, *0166 : the result of one year’s observation 
gives it *0004 less than the maximum oscillation which happens 
at 9 A. M., or •0174. In London, the evening oscillation (4 p. m. 
to 11 p. M.,) *023 ; in York, (4 to 9>) ’0170; in Edinburgh, 
(4 to 10,) •0097- The nightly oscillation in London (11 p. m. to 
4 A. M.) is -0116; at York, (9 p. m. to 4 a. m.) -0094, 
