Calenda)' of Nature. 



.^OS 



Art. V. Calendar of Nature, 

 Scotland. 



Diagram, showing the Motion of the Mercury in the Barometer, Ther- 

 mometer, and Differential Thermometer, or the mean, for each ten days 

 of January, February, and March, 1829; as extracted from the Register 

 kept at Annat Gardens, Perthshire, N. lat. 56° 23^', above the level of 

 the sea 172 ft., by the mean of daily observation at 10 o'clock morning 

 and 10 o'clock evening. (It may be proper here to correct an error in 

 the notice of the meteorological table kept here, in last Number, p. 94., 

 where the latitude is stated to be " 56° 35|V' in place of 56"^ 25\'.) 



An unaccountable difference appears between the mean temperature of 

 last year, by the register kept at this place, and that kept at Wycombe 

 Bucks by Mr. Tatem, where the difference in favour of a higher temper- 

 ature is more than 4i° of S. lat. in favour of Wycombe, and which, 

 according to Mayer's formula, supposing the height above the level of the 

 sea of both places to be the same, should give about 5° of higher tem- 

 perature at Wycombe than at Annat Gardens, but, in place of this, the 

 annual average is reported to be nearly 2° lower. 



As I conceive it to be of much importance to the science of meteorology, 

 as well as the credit of your publication, that such discrepancies should be 



p 2 



