10
the same with phosphoric acid, and from this fact, your property, the Island of Navassa, acquires a value that can hardly be exaggerated, and the working of it on the largest possible scale, will be the source of considerable and most legitimate profits.
G. A. LIEBIG.
ANALYSIS.
| I. LOOSE DEPOSITS. | |||
| A. Lower Flat. | |||
| Phosphate of Lime. | Phosphate of Iron and Al. | Phosph. Acid in toto. | |
| Lulu Bay | 63.47 | Not determined | Not Determined. |
| "" | 62.37 | " | 39.11 |
| East of Lulu Bay | 72.96 | " | 36.94 |
| "" | 71.22 | " | 34.10 |
| South and Southeast | 61.46 | " | Not Determined. |
| "" | 73.05 | " | " |
| East of Island | 58.35 | " | 33.80 |
| "" | 63.58 | " | 33.94 |
| North Crust | 77.71 | " | Not Determined. |
| " | 69.27 | " | 32.65 |
| B. Upper Flat—Rust Looking. | |||
| Surface | 64.77 | 5.66 | Not Determined. |
| Fine | 50.63 | 8.22 | " |
| " | 57.11 | 6.44 | " |
| Cave contents | Gray colored. | ||
| 69.36 | Not determined | Not Determined. | |
| 68.55 | 5.55 | " | |
| II. LAYERS AND BOULDERS. | |||
| Light Yellow Color | 32.55 | 9.64 | Not determined. |
| Yellow | 56.11 | Not Determined | 34.53 |
| Brown | 71.75 | 5.11 | 34.41 |
| " | 71.55 | 8.55 | 36.51 |
| Blasted 4 feet below | 75.66 | Not Determined | Not Determined. |
P. S.—Some varieties of the native phosphate of lime resist with great force the dissolving action of Sulphuric acid, thereby impeding the process of manufacture of super-phosphate of lime. I have made several experiments to that effect with the Navassa-phosphate, and found that it offers no difficulty in successfully converting it into super-phosphate—samples of which contained from 10 to 15.5 per cent. of soluble phosphoric acid.
G. A. LIEBIG.
