120 
DEPOSITS OF PHOSPHATE OF LIME. 
[BULL. 46. 
[III. Analysis of Guanape Island guano, by Dr. C. U. Shepard, jr.] 
Nitrogen 8. 20 to 12.80 
Phosphoric acid 10. 77 to 17.62 
Sand and siliceous matter 0. 75 to 3.75 
Water 11. 83 to 29. 96 
[IV. Average of 22 analyses of Guaiiape guano, by Barral.] 
Nitrogen 10.95 
Phosphates 28.00 
Potash 2 to 3 
[V. Analysis of Guanape guano, by Bobierre.j 
Water 24.00 
Sand 
1.30 
Organic matter and ammoniacal salts ( 1 ) . . . . 37. 00 
Bone phosphate of lime 36. 00 
Undetermined matter 1.70 
(1) Nitrogen 
100. 00 
7.75 
[VI. Analyses of soluble guanos, by Deherain.] 
Organic matter 
Containing nitrogen 
Equivalent in ammonia. 
Total pbospbates 
Angamos, coast 
of Bolivia. 
Wbite guano. 
70. 21 to 52. 92 
20. 09 to 14. 38 
24 36 to 17. 44 
13. 30 to 20. 95 
Bolivian. 
23.00 
3.38 
4.10 
Los Patos. 
32.45 
5.92 
7.18 
34.81 
Island of Elide, 
coast of 
California. 
27. 37 to 34. 50 
1.34 to 6.98 
1.62 to 8.46 
1 28. 00 to 31. 00 
Ilotde 
Pedro-Bey, 
coast of 
Cuba. 
6.16 
0.28 
0.34 
48.52 
Organic matter 
Containing nitrogen 
Equivalent in ammonia 
Total phosphates 
Mexican coast. 
13. 05 to 18. 00 
0.21 to 3.45 
0.26 to 4.19 
8. 00 to 25. 00 
Galapagos , 
Ecuador. 
0. 7 
0.85 
60.30 
Falkland 
Islands. 
17. 35 to 28. 68 
0.56 to 2.26 
0.68 to 2.74 
'21. 46 to 25. 62 
'Containing sometimes very considerable quantities of phosphates of alumina and the oxide of iron. 
[VII. Analysis of Peruvian guano by Dr. Ure, Am. Jour. Agric, 1845.] 
Uric acid 10.50 
Ammonia 19.00 
Phosphoric acid 14.00 
Lime and magnesia 16.00 
Salts of soda and potash - 6.00 
Oxalic acid, with carbonic and muriatic acids 13. 00 
Water 13.00 
Sand 2.00 
Volatile and organic matters €.50 
100. 00 
(594) 
