PR OEMS 2 rate ey tn ae rt ae WER So Wy Nate a ele es 
SOD TORE Se ty SSRI I ee i i i ee ih nM ae tt OO oh Sa ec ee 
i - 
* 
J. LeConte on the Silver-Spring in Florida. 1] 
Doubtless there are many other springs to be found in the 
State of =u a, whose waters possess the same optical prop- 
erties as those of the e Silver-Spring; although perhaps, their 
oe hae be less perfect. The “Suwanee Spring” is 
exhibit analogous phenomena; and the famous foun- 
tain sea ten miles from Tallahassee, called Waehulla or 
ape 
s in some measure related to the peculiar system of sub- 
terranean yaaa above indicated, it may not be deemed in- 
produced the several qualities of surface soil, which are found 
in the neighborhood of Ocala and the Silver- ‘Spring. The 
whole of this portion of the Peninsula appears to have been 
— composed of a mixture of sand and shell-limestone; 
of the Eocene period. The lime-rock comes to the 
at ne almost everywhere; in some cases, it is composed of 
nearly pure carbonate of lime; in others, silicification, to a 
greater or less extent, has taken place by the displacement of 
the _ by silex. But in all cases where its structure can 
aqueous sn In the ae and densely-w 
mock lands, large quantities of soft carbonate of lime may aw 
found at or near the surface. In the Mulatto pine lands, which 
are extensively cultivated in cotton and Indian corn, the 
amount of surface carbonate is less abundant; a considerable 
portion of it having been either silicified or removed from the 
soil. While in the sterile sandy pine-lands, no lime is to be 
found: the whole of the rock having disap eared, excepting 
that which has undergone silicification. In the ammoc 8, an 
impervious substratum of clay has prevented the lime 
clay) the substratum is a ne rvious, so t 
of the lime has been removed -_while i in the Pics 
s 
ing no surface rocks excepting those which 
— to this seid ae sn hat pine - lands, 
iy 
