10 
FLORIDA GEOLOGICAL SURVEY-I4TH ANNUAL REPORT 
supply of central Florida was the subject of the first bulletin issued. 
This has long been out of stock. In succeeding annual reports this 
valuable natural resource has been reported upon for other portions of 
the state. To meet the constant demand for information on this subject 
for the several counties of Florida and the need for bringing up to date 
local details consequent to a growing state, it has been deemed advisa¬ 
ble to revise the previous separate reports covering sections of Florida 
and to incorporate the matter in one volume. 
WORK PROVIDED FOR. 
For several years there has been an insistent demand for information 
on the clays of the state. With the gradually decreasing supply of tim¬ 
ber and the increasing cost of lumber for construction has come the 
growing demand for the more permanent building materials. The fact 
must not be lost sight of, that Florida uses millions of brick also for the 
surfacing of streets and roads. If clays could be found that would make 
a satisfactory vitrified block, not only would it mean an immense saving 
in the item of freight alone but it would also mean the bringing of im¬ 
portant new industries to the state. 
The need for a testing laboratory in connection with the usual work 
of the Survey has been urged, and appropriation for such installation 
has been requested, but without result. During the past year, however, 
arrangements were made to have the clays of the state investigated by 
Professor Olin G. Bell, of Cornell University. 
Field work for this report will be carried on during the summer of 
1922, and samples of all commercially promising deposits will be taken 
and tests made in the laboratory of the university just mentioned. The 
results of this work will be made available as early as possible, and it is 
hoped that the investigations will be the means of bringing to light de¬ 
posits of clay suitable for the manufacture of various products. Such 
investigations would assist in establishing new industrial enterprises 
and be of service to those already established. 
CO-OPERATION WITH THE UNITED STATES GEOLOGICAL SURVEY 
During the past year the Florida Survey continued its co-operation 
with the United States Geological Survey in the matter of collecting 
statistics on mineral production. By this means, duplication of work 
