1 22 FLORIDA GEOLOGICAL SURVEY-SEVENTH ANNUAL REPORT. 
Fig. 53— Sketch map showing the location of the Ocala area in Florida. 
They are all from the hammock belt and therefore do not represent 
the average of the area. The first is of a sample collected by Dr. 
Eugene A. Smith in the summer of 1880, and analyzed under his 
direction at the University of Alabama by John B. Durrett, by the 
acid digestion method.* The other samples were collected by R. M. 
Harper in the spring of 1915, and analyzed by L, Heimburger, As¬ 
sistant State Chemist, by the A. 0 . A. C. methods for fertilizers.f 
This method is believed to extract less potash than the acid digestion 
method, but the results for the other constituents can probably be 
safely compared with those obtained by the older and slower method. 
Nitrogen is included in the volatile matter, and was not deter¬ 
mined separately in the older analysis. Soda, magnesia, sulphur, 
manganese and soluble silica were not tested for, and iron and 
alumina were not separated by Mr. Heimberger, for their determin¬ 
ation would have taken more time than their importance seemed to 
warrant. 
The samples are as follows: 
1. Dark gray high hammock soil, 10 inches deep, from one 
mile south of Ocala. Vegetation live, white and water oaks, mag¬ 
nolia, hickory, (red?) bay, sweet and sour gum. 
^Results copied from Tenth Census U. S., 6:204, 214, 1884. 
tFor a more explicit statement of the methods used see 6th Annual Re¬ 
port Fla. Geol. Surv., p. 397. 
