Plate No. 
ILLUSTRATIONS. 
Following I’age. 
i. 
3 * 
4 - 
5 - 
Fig. i. Phosphate washer . 
Fig. 2. Drill used in prospecting for hard rock phosphate. 
Fig. 3. View of incline to pit. 32 
Fig. 1. Pit of hard rock phosphate mine... 
Fig. 2. Top surface of Miami oolitic limestone. 
Fig. 3. View showing laminated structure of plate rock deposit. 32 
Fig. 1. Pit of land pebble phosphate, Mulberry. 
Fig. 2. View showing indurated overburden in pebble phosphate. 
Fig. 3. View of abrupt break in the phosphate stratum. 32 
Fig. 1. Irregular top surface of bed rock of land pebble. 
Fig. 2. Unconformity of the phosphate stratum. 
Fig. 3. Irregular line of contact between yellow and gray sand.... 32 
Pit of plate rock phosphate mine showing very irregular top sur¬ 
face of limestone... 
32 
