Penrose] LEACHED GUANO , 125 
Table of analyses of leached guanos. 
[I. Analyses of Baker Island guano (constituents, lumps, crust, coral rock, etc.), by Siegert.] 
Water 
Combustible matter (1) 
Potasb 
Soda 
Lime 
Magnesia 
Phosphoric acid 
Sulphuric acid 
Carbonic acid 
Total 100.00 
(1) Nitrogen 
(') 
( 2 ) 
( 3 ) 
( 4 ) 
( 5 ) 
1.45 
10.25 
9.03 
0.90 
8.20 
2.57 
5.11 
4.02 
4.47 
8.30 
0.10 
0.44 
0.43 
0.46 
0.62 
8.45 
0.73 
0.62 
1.21 
1.13 
53.78 
43.83 
43.44 
45.82 
40.63 
0.27 
0.42 
0.60 
1.89 
1.75 
0.00 
33.97 
33.62 
38.98 
37.16 
1.40 
2.07 
6.81 
1.16 
1.17 
39.98 
3.18 
1.43 
5.11 
1.04 
100. 00 
100. 00 
100. 00 
100. 00 
100. 00 
0.00 
0.00 
0.00 
0.00 
0.92 
(') Unchanged coral white rock. 
( v ) Yellow-brown crust, often several inches thick, with white interior, of coralline structure. 
( 3 ) Gray-brown balls, soft to pulverulent, often several inches thick; coralline structure feebly 
marked. 
( 4 ) Porcelain -like cakes, smooth or rough, soft, 1 to 4 inches thick, and in parallel plates. 
( 5 ) Whole guano powdered. 
[II. Analysis of Howland Island guano, by Drysdale.] 
Water 7.20 
Combustible matter . 14. 18 
Phosphates 75.32 
Sulphate of lime 1. 60 
Carbonate of lime, 1.27 
Chloride of alkalies 0.43 
Sand Trace 
[IIT. Analyses of Jarvis Island guano, dried at 105 C] 
Powder. 
Water of combination and combustible matter „ 20.80 
Anhydrous sulphate of lime 30. 00 
Phosphates of lime and magnesia 43. 20 
Siliceous residue 2. 00 
Undetermined ingredients and loss 4. 00 
100. 00 
Lumps. 
18.50 
5.00 
73.00 
1.00 
2.50 
100. 00 100. 00 
[IV. Analyses of Phoenix Island guano, by Rumpler.J 
Water 1.19 2.08 
Combustible matter 2.03 5.22 
Phosphate of lime 76.00 70.70 
Phosphate of magnesia 5. 19 13. 47 
Carbonate of lime 0.68 10, 50 
Sulphate of lime 0.34 5.10 
Nitrogen in the combustible matter 0. 39 0. 77 
(599) 
