VIEWS SHOWING CHARACTERISTICS OF THE PHOS¬ 
PHATE PEBBLES OF THE BED ROCK MARL AND 
OF THE PHOSPHATE BED, 
Fig. 22.—Phosphate pebbles, shark and ray teeth washed from the bed rock 
from the pit of the Phosphate Mining Company near Mulberry. 
The analysis of these pebbles is as follows: 
Moisture -■—---- .94 
Insoluble matter, sand, etc.-------- 6.11 
Phosphoric acid, 24.88, equivalent to tricalcium phosphate -- 5434 
Iron and alumina-—- 0.27 
Calcium oxide, 7.58, equivalent to calcium carbonate- 17.24 
Fig. 23.—Phosphate pebbles from the phosphate bed (Bone Valley forma¬ 
tion). From the pit of the Phosphate Mining Company, Mulberry. 
The analysis of these pebbles is as follows: 
Moisture - 3.22 
Insoluble matter, sand, etc.- .35 
Phosphoric acid, 34.73, equivalent to tricalcium phosphate- 75.85 
Iron and alumina- 0.28 
Calcium oxide, 3.73, equivalent to calcium carbonate--- 8.49 
t 
94 
