In 1825, the Regents of the University required meteorological 

 observations to be made in each of the Academies under their care. 

 These were directed to be taken between daylight and sunrise, as 

 showing the lowest degree of temperature in the twenty-four hours ; 

 between 2 and 4 P. M., or in other words, at 3 P. M., as the 

 warmest point, and every evening an hour after sunset. The 

 mean was to be ascertained by adding to the morning's observa- 

 tion twice the afternoon's and evening's and that of the next morn- 

 ing. The sum of these four was to be divided by six, and the re- 

 sult placed in the mean column. The mean of each half month 

 and month was also to be calculated. 



I continued both these series of observations (at 7 A. M., 2 P. 

 M. and 9 P. M., and according to the mode directed by the Re- 

 gents,) for the years 1826, 1827, 1828 and 1829, in order to as- 

 certain the discrepancies, if any, that might exist between them. 

 After the last named year, finding both too laborious, I continued 

 only that which was directed by the Regents. The following ta- 

 bles show the results obtained. 



