22 



BIBDB OF ILLINOIS. 



Observations taken at West Salem, Edwards Co., Illinois, (lat. 

 38 30', long. 88), for 4 years, give almost exactly the same total 

 precipitation for the year as that which, according to the above 

 table, has been ascertained for Cairo, the difference amounting to 

 only .60 of an inch. The monthly means are considerably dif- 

 ferent, however, as the following will show. In this table are also 

 included the results of observations at New Harmony, Posey Co., 

 Indiana, (lat. 38 .08', long. 87 50'), for 12 years both being com- 

 piled from the Smithsonian tables of precipitation, above referred 

 to: 



The rainfall is apportioned to the different seasons, as follows: 



The maximum and minimum mean annual rainfalls, during the 

 years of observation, at the above mentioned localities was as follows : 



West Salem. Maximum (1858) 51 . 00 inches . 



Minimum (1859) 41 02 



New Harmony. Maximum (1855) 48 . 11 " 



Minimum (1856) 23.18 



Meteorological observations have been taken regularly at Mount 

 Carmel during the past few years by Mr. James Pool, recently ap- 

 pointed U. S. Signal Observer, who has kindly favored me with the 

 following data : 



Mean monthly temperature and total precipitation, for the year 

 1876. (Three obervations daily, viz., at 7 A. M., 2 P. M., and 9 

 P. M., local time.) 



