44 
FLORIDA GEOLOGICAL SURVEY. 
the abundance of sand is greatly in favor of this industry. 
Most cities of considerable size have one or more firms 
engaged in the manufacture of this material. Sand suit¬ 
able for the manufacture of concrete building blocks 
occurs in almost all parts of the State. 
MINERALS NEW TO THE STATE. 
Sulphur. 
Native sulphur has been found in Florida during the 
past year, a large mass estimated to weigh two tons hav¬ 
ing been brought up from the pit of the Dutton Phosphate 
Company, at Floral City. The phosphate at this place 
was worked down to the water level as a dry pit and is 
now being worked below the water level by dredging. The 
mass of sulphur was brought up on the dipper from 
about thirty feet below the water level, or a total depth 
from the original surface of about seventy feet. When 
first brought up the sulphur mass was mistaken for a 
rock boulder, which being too large to go through the 
dipper, was drilled into and blasted. Most of the pieces 
fell back into the pit, a few thrown on the land were found 
to be crystallized sulphur with only a slight admixture of 
impurities. The phosphate beds of Citrus County rest 
upon Lower Oligocene limestone. The sulphur was found 
either upon or in Oligocene limestone. 
PROBABLE SOURCE OF SULPHUR. 
In a Bulletin on the Water Supply which accompanies 
this report the writer has discussed in some detail the 
probable source of hydrogen sulphide in underground 
waters. It is there shown that the hydrogen sulphide in 
underground water is supplied not from deposits of native 
sulphur, but from decaying organic matter and from sul¬ 
phides and sulphates contained in the rock. It is also 
shown that hydrogen sulphide, while not originating from 
