And the “ Great Carolina Marl Bed.” 53 
NAVASSA GUANO. 
Contains about 49 per cent. Phosphate of Lime, 
and 12 per cent. Phosphate of Alumina and Iron. 
Analysis of Swan's lsland Guano—Cargo of “G. 7. 
Ward =” 
BALTIMORE, June 11, 1866. 
Water and Organic Matter, : ‘ 20.81 
Phosphoric Acid, : ; 28.34 
Lime; : : ; ‘ 23.88 
Sand and fuisolubie eee : 15.00 
Indifferent Matter, . 11.97 
The Phosphoric Acid ae ee is ee to 61.87 of 
bone Phosphate of Lime. 
(Signed) G, A. Lixrsic. 
Composition of Recent Oyster Shells, (Xane.) 
Animal Membrane, : 0.5 
Carbonate of Lime, é : ’ SY MOSS 
Phosphate of Lime, : : 1.0 
a 100.00 
Ashley Marls, (Clement’s,) Professor Shepard. 
Silicas yy: Y : : , é ; . 1528:00 
Carbonate of Lime, (with traces of Magnesia,) 58.00 
Phosphate of Lime (with traces of per oxide 
of iron.)  . : AMS ISO 
Alumina, ; : : : : ; A O:80 
Water; ; : ey A480 
Loss, . E : : : : ; 40 
100.00 
