MARYLAND GEOLOGICAL SURVEY 



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TABLE II. 



Monthly and Anncal Mean Tempeeatup.es » at Cheretfields, Md., 1893-1S99. 



' Observations at 8 a. m. and S p. m. 



TABLE III. 

 Monthly Mean Tempeeatuees at Ridge, Md. 



Table I and subsequent tables contain the monthly and annual mean tem- 

 perature and total precipitation at all stations in St. Mary's County. 

 Table XXIV gives the necessary statistical data. The following remarks 

 are pertinent: 



The observations at Charlotte Hall were commenced by Mr. R. W. Sil- 

 vester in 1892, but were continued by him for less than a year, therefore, the 

 larger portion of the work at the station is credited to Prof. J. F. Coad. 

 In 1905 Rev. J. Neilson Barry became observer at Charlotte Hall, and it is 

 hoped a new and valuable series of records will be secured for that station. 



At Cherryflelds the temperatures were observed at 8 a. m. and 8 p. m.; 

 the means given in Table I, are the original records, but the corrected means 

 were reduced to the equivalent of maximum and minimum readings by 

 applying a correction determined by the difference between the means from 

 8 a. m. and 8 p. m., and from maximum and minimum temperatures at Balti- 

 more. At Leonardtown the means are from observations at 7 a. m. and 2 

 and 9 p. m. These have not been corrected to the means of maximum and 

 minimum temperatures because the differences are very small. 



As regards precipitation the records at St. Inigoes are of doubtful value; 

 at Charlotte Hall the irregularity of the record causes the rainfall to come 

 out too small for the period. 



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