12 FLORIDA GEOLOGICAL SURVEY I3TH ANNUAL REPORT 



est and desirable to have data on the fluctuation of flow which 

 could be gotten only by records covering a stated period. 



Co-operation in the matter of the gauging of streams could 

 be arranged with the Water Resources Branch of the United States 

 Geological Survey and it is urged that provision be made for enter- 

 ing into such co-operation. 



CO-OPERATION WITIT OTHER ORGANIZATIONS. 



The Florida Geological Survey has co-operated with the United 

 States Geological Survey, as in former years, in the collection of 

 statistics on the mineral production in Florida. This co-operation 

 has been found highly desirable and advantageous since it elimi- 

 nates the possibilities of discrepancies in statements which might 

 occur when such statistics are collected separately by each Survey. 



TOPOGRAPHIC MAPPING. 



In this day of rapid development in the State coupled with 

 undertakings of vast magnitude such as the enormous drainage 

 projects, the plans for and the construction of permanent systems 

 of highways, renewed activity in railroad extensions, etc., nothing 

 could better serve as an essential aid in this development than de- 

 tailed topographic maps. These maps are as accurate as the scale 

 used (approximately a mile to the inch) will allow, showing every 

 natural surface feature, such as rivers and creeks, springs, lakes, 

 swamps and marshes, hills and valleys, sink-holes and rock out- 

 crops in addition to artificial features as cities and towns, schools, 

 •churches and other buildings, railroads, highways, as well as minor 

 roads, and bridges. In fact, such maps as these prepared by the 

 United States Geological Survey are indispensable to the most in- 

 telligent development of many of the State's resources and indus- 

 tries. With their aid the construction engineer can lay out a right- 

 of-way for either highway or railroad without the expense of the 

 preliminary survey and the drainage engineer can lay out a system 

 of canals and ditches in the office almost to better advantage than 

 in the field. To the general public, and particularly to those who 

 travel, the maps are of great convenience and benefit, for a mo- 

 ment's glance reveals the exact physiography and general nature 

 of the country mapped. 



