106 FLORIDA GEOLOGICAL SURVEY ELEVENTH ANNUAL REPORT. 
low ebb, since the export business is cut off and the hard rock is 
used only to a limited extent in the domestic trade. During* 1917 
soft phosphate rock entered to some extent into the phosphate 
production, the total combined shipments of hard rock and soft 
phosphate being 18,608 tons. 
“The value of phosphate shipped from Florida during 1017 is 
estimated as $5,464,493, while that shipped during 1916 was vahied 
at $4,170,165. The production of phosphate rock in Florida since 
the beginning of the industry in 1888 to the close of 1917 is es- 
timated by the Florida Geological Survey to be 33,143,084 tons, 
The value of the phosphate rock produced in Florida since 1888, 
according to statistics collected by the United States Geological 
Survey, is $122, 966,681.’’ 
SUMMARY OF SHIPMENT OF PHOSPHATE IN FLORIDA FROM I9I3 TO 
I917, INCLUSIVE. 
Pebble Rock — 
I9I3- 
1914. 
19*5- 
1916. 
1917 . 
Exported 
887,398 
625,821 
185,846 
172,427 
138,010 
Domestic 
. 1,168,084 
1,203,381 
1,122,635 
1,296,331 
1,865,981 
Total shipment — 
__ 2,055,482 
1,829,202 
1,308,481 
1,468,758 
2,003,991 
Hard Rock- 
Exported 
476,898 
303,172 
43,314 
28,045 
12,403 
Domestic 
12,896 
6,517 
6,816 
19,042 
6,205 
Total shipment 
489,794 
309,689 
50,130 
47,087 
* 18,608 
Pebble and Hard Rock 
Combined— 
Exported 
_ 1,364,296 
928,993 
229,160 
200,472 
150,413 
Domestic 
_ 1,180.980 
1,209,898 
1,129,451 
L3i5,373 
1,872,186 
Total shipment 
2,545,276 
2,138,891 
i ,358,6 ii 
1,515,845 
2,022,599 
Total shipments from beginning of 
mining in 1888 to 1917, 
inc. 
33,143,048 
LIST OF MINING COMPANIES OF FLORIDA. 
Acme Phosphate Company _____ Morristpn, Fla. 
Alachua Phosphate Company 
American Agricultural Chemical Co._— .2 Rector St., New York, N. Y., and 
Pierce, Fla. 
American Cyanamid Co. 200 Fifth Ave., New York, N. Y., and 
Chicora, Fla. 
* Includes soft rock phosphate. 
