METEOROLOGY. 319 



Example. 

 Reduction of observation for temperature by the formula 

 East corner of the District ot Columbia, September 1, 1857. 



* i' A = 9.6 : 15.5 = 0.62 

 0.09 



Normal eq.. 



No. of observations, 16. 

 Result, 



± 0.53 



p= 1.53 



t^— 69^.4 ±0.13 



£o= ± 0.5 



