Meteorology of Xeio Haven. 



199 



We next took the average between tlie corrections deduced from 

 observations made at Girard College, Frankford Ai'senal, Amherst 

 College and Cambridge, and obtained the following provisional table, 

 which it is presumed must represent nearly the corrections applicable 

 to New Haven. 



Corrections to be applied to the means of the hours of observation^ to 

 obtain the true mean temperature of New Haven. (Provisional.) 



This table has only been employed to reduce a few observations 

 made at irregular hours to certain fixed hours. After determining 

 the mean temperature of New Haven at certain fixed hours, we em- 

 ployed these results to deduce a more reliable table of the hourly 

 corrections. 



The following table shows the results of the entire series of obser- 

 vations at New Haven ; the observations being classified by months, 

 and divided into two groups, the first embracing the observations to 

 1820, Column 1st shows the year of the observations; column 2d 

 shows the time of the morning observation expressed in hours and 

 decimals of an hour ; column 3d shows the observed mean tempera- 

 ture ; column 4th shows the time of the observation nearest to the 

 hour of greatest heat; column 5th shows the observed temperature; 

 column 6th shows the time of the evening observation ; column 7th 

 shows the observed temperature; column 8th shows the mean of the 

 three preceding temperatures ; column 9th shows the lowest temper- 

 ature observed during the month; column 10th shows the highest 

 temperature observed during the month; and column 11th shows the 

 difl:erence between the two numbera last mentioned. 



