GEOGRAPHY OF CENTRAL FLORIDA 8 1 



used with caution. The principal use made of them here is to 

 determine the relative importance of different crops in 1913-14 and 

 1917-1918. Besides returning the crops in more detail, and giving 

 not only acreage but values by counties, another advantage of the 

 state census is that its crop year runs from July i to June 30, on 

 account of Florida's most valuable crops being harvested in winter 

 and spring, while the government census naturally returns the 

 crops by calendar years in Florida, for the sake of uniformity with 

 other states, all of which have colder winters and mostly summer 

 crops. 



On account of the appropriation for the Geological Survey re- 

 maining at the same number of dollars per annum that it was when 

 money was worth twice as much as it is now, rigid economy has 

 had to be exercised in the selection of illustrations. Out of several 

 hundred photographs available for the purpose, the choice has been 

 narrowed down to 25 new half-tones and 14 old ones. This leaves 

 without illustration such interesting physiographic features as the 

 supposed highest hill in the state (in Polk County), the limestone 

 caves of Marion County, the noted natural race-course of Daytona 

 Beach, salamander hills, and several beautiful lakes and rivers; 

 such vegetation types as grassy dunes, peat prairies and several 

 other types of prairie, the characteristic low hammocks of the Gulf 

 hammock and lake regions, the short-leaf pine and hickory woods 

 of north-central Marion County, calcareous swamps of various 

 kinds, and the flatwoods, bays, and lake shore vegetation of the 

 lake region; and such artificial features as phosphate mines (both 

 hard rock and pebble), the "diatomaceous earth" plants of Lake 

 County, clay pits, sawmills, turpentine stills, roads of crushed 

 limestone, brick, shells, or pine-straw, stone walls, rock chimneys, 

 cattle ranches, orange groves, sugar-cane fields, truck farms, types 

 of farm-houses, cities, towns, hotels, etc. And the counties of Sum- 

 ter and Hillsborough do not happen to be represented at all in the 

 illustrations, although many pictures have been taken in both. But 

 some of these features or places are well illustrated in previous pub- 

 lications of this Survey, or in easily accessible magazines and 

 pamphlets. 



Fisrures ^, 7. 9, 11-1*3. 20-22. 29. 35. 36. 39 and 41 are from 

 earlier rcDorts. and the remaining 25 are new. All are made from 

 photos^raphs in the writer's private collection of American sreo- 

 p'raphical views, except three that are otherwise credited. They 



