PRODUCTION OF PHOSPHATE ROCK IN FLORIDA DURING 
1011 . 
By E. H. Sellards. 
Summary of production and shipments during 1911. 
Long tons. 
! On hand January 1, 1911... 201,499 
Mined during 1911. 474,094 
Consigned for use in the U. S. during 1911. 16,723 
Exported during 1911. 462,072 
On hand January 1, 1912. 196,592 
/ On hand January 1, 1911. 227,236 
\ Mined during 1911. 2,020,478 
Pebble rock < Consigned for use in U. S. during 1911. 1,274,056 
I Exported during 1911. 703,589 
\ On hand January 1, 1912. 273,699 
Total amount of hard rock and pebble rock on hand Jan., 1911.... 428,735 
Total amount of hard rock and pebble rock mined during 1911.... 2,494,572 
2,923,307 
Total shipments of hard rock and pebble rock during 1911. 2,456,440 
Total amount of hard rock and pebble rock on hand Jan. 1, 1912.. 470,291 
2,926,731 
Correction by minor discrepancies as to the amount on hand. 3,424 
2,923,307 
11—G R 
