64? Dr Brewster on the Mean Temperature of the Equator, 



Hill, but as we do not know the height of this station w6 

 cannot use them in the present inquiry. 



1815-16. 

 The observations for this year extend from June 1815 to 

 July 1816. They were made at intervals of three hours, viz. 

 at 6\ 12\ 3, and 9^ p. m. 



Mean temperature at 6^* a. m. - - - 76° 1 



12 noon, - . - 79 6 



3 p. M. - - - 81 5 



9 P. M. - - - 79 1 



The corrections for these hours deduced from the observa- 

 tions at Leith are -f 2° 61 ; — 2° 5 ; — 3° 20 ; — 0° 43. 

 Hence we have 



Mean daily temperature deduced from 6^ 



12 



3 



.. 9 



Mean of the four, 78° S 

 But by applying the corrections taken from the summer 

 months, viz. + 3° 5 ; — S° 9 ; — 3° 9 ; + 0° 7, we have 



Mean daily temperature deduced from 6h - 79° 6 . 



12 - 76 7 



3 - 77 6 



9 - 79 8 



The observations for this year were made at 7'^ a. m. 12 

 noon, and 4 p. m., and the results were, 



Mean annual temperature at 7*^ - - - 77° 8 



12 - - - 81 6 



4 - - - 83 1 



The corrections for these hours deduced from the observa- 



