SOME FLORIDA LAKES AND LAKE BASINS. 
51 
The total solids 
removed 
in solution through six 
other springs 
of central Florida, 
expressed 
in tabular form, gives 
the following 
results A 
Total solids 
Est. flow 
Solids re¬ 
Name of Spring 
County. 
(parts per 
(gals, per 
moved lbs. 
millionf) 
min.) 
per day. 
Blue .. 
112.1 
349 -166 
469,698 
Blue .... 
196.8 
25,000 
59,040 
Ichetuckn-ee ... 
211.6 
180,000 
457,050 
Newland . 
233.5 
75,ooo 
210,150 
Weekiwachee ... .. 
227.8 
100,000 
273,360 
White Sulphur ....... 
. .Hamilton 
166.6 
32,400 
64,774 
Suwannee . 
332-7 
19,747 
78,816 
As the basis of an estimate of the total solids removed annually 
from the interior, let it be assumed, (i) that the average total solids 
in spring water amount to as much as 219 parts per million, this 
average being obtained from eight of the typical large springs of 
central Florida; (2) that the annual escape of the underground 
water approximates the annual in-take, amounting, as previously 
estimated to 460,536,689 gallons per square mile. Upon these 
estimates the mineral solids removed amount to a little more than 
four hundred tons annually per square mile. 
Of the minerals thus removed, calcium carbonate or limestone 
greatly predominates, exceeding the combined weight of all other 
minerals. From the analyses it appears that magnesium carbonate, 
magnesium and calcium sulphates are present in variable, although 
usually limited, quantities. Chlorides are normally present in small 
amount, although occasionally, as in the case of Perrian Spring, 
they are exceptionally high. Silica is present in amounts varying 
from 5 to 25.5 parts per million. Traces of phosphoric acid and of 
iron and alumina are usually present. 
The several undetermined factors which enter into the above 
estimates of mineral solids removed make it difficult to formulate 
a concrete statement of the rate of lowering of the general surface 
level. Nevertheless, such statements are desired and have a com¬ 
parative value. Assuming for the rock removed, most of which is 
*For 340 in the second line from the bottom on the preceding page read 840. 
fOrganic matter is deducted from the total solids as given for Suwannee 
Sulphur and White Sulphur Springs. The organic matter occurring in the 
other springs is of small amounts and was not separately determined. Analyses 
of the water of these springs were given in Bulletin No. I, pp. 72-75, 1908. 
