V REPORT OF 



RESULTS OF OBSERVATIONS 



ON THE 



OSCILLATION OF THE BAROMETER, 



At several hours, between 4 a. m. and 10 p. m. at York, 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 



4 8 9 4 9 10 



+ + + + + 



•0075 -0163 -0178 standard -0170 -0162 



2d, The mean of the heights at 9 a. m., and 4 p. m. being taken 

 as the standard. 



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 •OSS. 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, 



