MARYLAND GEOLOGICAL SURVEY 



189 



The observations made under the direction of the Surgeon-Gen- 

 eraFs Office of the Army Medical Department are, as a rule, made 

 at 7 a. m., 2 p. m. and 9 p. m., and include the reading of the 

 barometer, the thermometer, hygrometer, raingage, force and direc- 

 tion of the wind and the state of the weather. 



Fig. 2. — Map showing stations from wliich meteorological data are discussed. 



The observations made under the direction of the Smithsonian 

 Institution are also made at 7 a. m., 2 p. m. and 9 p. m., and include 

 the same phenomena as the preceding observations except there are 

 no readings of the barometer. 



