MARYLAND GEOLOGICAL SURVEY 29 



late crops of tomatoes and corn for canning purposes has for a long 

 time been an important industry and has placed Cecil county in the 

 first rank among the tomato-canning districts of the country. 



The climate of the county is good. The normal temperature lies 

 between that of Baltimore and Philadelphia with an average daily 

 range of 14-21°, which in extreme cases seldom exceeds 40°. The 

 precipitation is evenly distributed, the monthly fall varying from 

 three inches in January and February to six inches in August. A 

 period of more than four or five weeks without rainfall is extremely 

 improbable. 



Detailed information regarding the physiography, geology, mineral 

 resources, soils, hydrography, climate, terrestrial magnetism, and 

 forestry are given in the succeeding chapters. 



E. B. M. 



