of the Barometer near Edinburgh. 169 



any place and for any period, in latitude d ; and by m' and t' those 

 quantities at the equator, M. BOUVARD gives 



'_ 



~ ~t cos. 



By this the column of calculated results in the table I now sub- 

 join has been computed, the temperatures in which, it is to be 

 observed, are not the mean temperatures of the place, but of the 

 hours included in the great period from 9 or 10 A. M. till 3 or 4. P.M. 

 I must also remark, that where the number of daily observations 

 was considerable, M. BOUVARD has made use of a formula depend- 

 ing on the sine of the diurnal arc. The application of this for- 

 mula is very briefly noticed in the abstract to which I allude ; 

 but it appears to have been almost entirely confined to inter- 

 tropical observations, where the oscillation has frequently to be 

 eliminated from the irregular observations of a few days. In 

 northern latitudes I have generally found the amount unaltered 

 from the original announcement in the various publications to 

 which these scattered results have been confined. I have added 

 to this valuable table, which contains many results previously un- 

 published, a few remarks as they occurred to me. 



