vaughan] FULLER S EARTH OF FLORIDA AND GEORGIA. 397 
Analysis of fuller's earth from land of Mr. William Bruce. 
Per cent. 
Silica 60. 80 
Alumina 15. 45 
Ferric oxide 1 . 95 
Lime 1. 60 
Magnesia 3. 12 
Water 9.90 
Moisture 6. 90 
Alkalies .70 
Total . 100.42 
Practical tests gave the following results: Its bleaching power on 
cotton-seed oil was but moderate. It bleached the petroleum to the 
standard shade adopted by the Standard Oil Company. 
Near the residence of Mr. Carmen, who lives 4 miles east of Quincy, 
outcrops of fuller's earth occur along the creeks and in the hillsides. 
Seven miles east of Quincy are other outcrops. 
LEON COUNTY, FLA. 
Twelve miles west of Tallahassee, on property belonging to Messrs. 
W. H. Allen & Sons, fuller's earth occurs. Several pits have been 
sunk by Mr. Rosendale. The overburden is about 6 feet, and there 
are about 8 feet of fuller's earth. The land lies rather flat, along a 
small creek running into the Ochlockonee River. 
The following gives the results of two practical tests by Dr. Ries: 
(1) Sample of fuller's earth from the land of Mr. W. H. Allen, 12 miles west 
of Tallahassee. I was not able to make this bleach mineral oil, or at any rate the 
bleaching action was slight, although I tried twice. 
(2) Sample of fuller's earth from 12 miles west of Tallahassee, on the land 
of Mr. W. H. Allen. This bleached the cotton-seed oil fairly well, but was not 
equal to the English material. 
A section on the Seaboard Air Line Railwaj^, about 1 mile east of 
Tallahassee, at milepost 163, shows the following exposures: 
Section on Seaboard Air Line Railway. 
3. The upper 25 or 30 feet at the ends of the cut are reddish, yellowish sands. 
2. Sands with clay partings, 5 to 10 feet. 
1. Whitish or bluish clay resembling fuller's earth, in thin lamina? with sand 
partings, 4 to 5 feet. 
Another cut, between mileposts 163 and 164, shows a similar sec- 
tion, in which the clay at the base resembles fuller's earth even more 
closely than that in the section first described. 
ALACHUA COUNTY, FLA. 
DeviVs Mill Hopper. — This is a lime sink several hundred yards in 
diameter and over 100 feet in depth in the Vicksbnrg limestone. It 
is situated about 11 miles from Alachua, on the road to Gainesville, 
being 5 or 6 miles from the latter place. A thin stratum of fuller's 
earth, apparently interbedded with the limestone, was discovered in 
the side of this sink. 
