18 PREFACE 



Bureau aud is also Meteorologist of the Marj'lanJ State Weather 

 Service. 



The Hydrography of St. Mary's Comity, by N. C. Grover, gives a brief 

 account of the water supply of the county which, as in the case of the 

 other Coastal Plain counties, affords but little power for commercial pur- 

 poses. The author of this chapter is a member of the Hydrographic Di- 

 vision of the U. S. Geological Survey. 



The Magnetic Declination in St. Mary's County, by L. A. Bauer, con- 

 tains much important information for the local surveyors of the county. 

 Dr. Bauer has been in charge of the magnetic investigations since the 

 organization of the Survey and has already published two important 

 general reports upon this subject. He is the Director of the Depart- 

 ment of International Research in Terrestrial Magnetism of the Car- 

 negie Institution. 



The Forests of St. Mary's County, by C. D. Mell, is an important con- 

 tribution and should prove of value in the further development of the 

 forestry interests of the county. Mr. ilell is a member of the U. S. 

 Forest Service. 



The State Geological Survey desires to extend its thanks to the several 

 national organizations which have liberally aided it in the preparation 

 of sevei-al of the papers contained in this volume. The Director of the 

 U. S. Geological Survey, the Chief of the U. S. Weather Bureau, the 

 Chief of the U. S. Forest Service and the Chief of the Bureau of Soils 

 of the U. S. Department of Agriculture have granted many facilities for 

 the conduct of the several investigations aud the value of the report has 

 been much enhanced thereby. 



