62 Dr Brewster on tf*€ Mean Temperature of' the Equator. 



ceeds that of 6^ a. m., and C^ p. m. h^ 0° 29, and is less than 

 that of noon by 2° 51 . Hence we have 



Mean daily temperature deduced from that 



of 6' and 6^ - - 79° 74 

 12 noon, 81 49 



Mean of the two, 80° 47 



As the corrections now applied belong to a northern climate, 

 marked with the vicissitudes of summer and winter, they can- 

 not be strictly applicable to tropical regions, where the varia- 

 tions in the monthly temperature are so exceedingly small. 

 We have therefore deduced the corrections from the hourly 

 temperatures of the three summer months, during which the 

 variations of the daily curve must have a greater resemblance 

 to those of the torid zone. These corrections, though differ- 

 ent from those used above, produce, as will be seen presently, 

 very little difference in the mean results. These corrections 

 are — 3.08 and — 3.00, and they give. 



Mean daily temp, deduced from Q^ and 6'^ . 79° 37 

 12 noon, 81 80 



Mean of both, 80° 18 

 Hence the mean annual temperature of Singa- 

 pore for 1822 was - - - - 80° 18 

 1823. 

 Mean annual temperature of 6** and &" - 79° 

 12 noon, 83 7 



By applying the same corrections as before, viz. those dedu- 

 ced from the summer months, we have 



Mean daily temp, deduced from 6*^ and 6^ - 78° 92 

 . — . 12 - 80 70 



Mean of both, 79* 81 



Hence the observed mean annual temperature 



of Singapore for 1823 was - - 79° 81 



And the observed mean annual temperature of 



1822 and 1823, .... 80 00 



