Peruvian Guano. 
205 
Moisture 13-27 
*()rganic matter and salts of ammonia 54 - 68 
Phosphates of lime and magnesia (bone-earth) .. .. 23 - 33 
f Alkaline salts .. 7'28 
Insoluble siliceous matter 1-44 
100-00 
"■Containing nitrogen 15-50 
Equal to ammonia 1S"82 
jContaining phosphoric acid 2-33 
Equal to tribasic phosphate of lime 5"05 
This guano contained 5"87 per cent, of ammonia in the state of 
ammoniacal salts. 
The addition of 5 per cent, of oil of vitriol imparted only a 
very faint acid reaction to the guano, thus showing that the acid 
did not act at once on the insoluble tribasic phosphate of lime. 
With 10 per cent, of oil of vitriol a decidedly acid solution 
was obtained, and with the larger proportions of acid of course 
this effect was still more decided. 
Composition of Peruvian Guano dried icith 5 per cent, of Oil of Vitriol 
(SO,, HO). 
Water driven off on long drying at 212° Fahr. 
Bi-pb.ospb.ate of lime 
Equal to bone-earth, rendered soluble by acid 
Alkaline salts 
Containing phosphoric acid 
Equal to tribasic phosphate of lime ' . . 
•Soluble organic matter and salts of ammonia 
Insoluble siliceous matter 
4-63 
o 
1-36 
00 
(2-12) 
1-84 
11-13 
° (Nl 
-5 £ 
(G-46) 
a "S 
QJ > 
O 
(13-99) 
5 £ 
43-91 i 
8-38 ) 
14-70 | 
■B "8 £ 
, "a S. "S 
12-37 | 
S | e= 
1-68 
9 .S ci 
100-00 
'Containing nitrogen 11-44 
Equal to ammonia 13-88 
| Containing nitrogen 3'66 
Equal to ammonia " 4-45 
The preceding figures suggest the following remarks : — 
1. The small addition of 5 per cent, of oil of vitriol had the 
effect of rendering fully one-half or the phosphates soluble in 
water. For the total percentage of phosphate amounted to 30 - 81. 
In this quantity we have — 
Soluble iu water : — 
Bi-phospbate of lime, calculated as tribasic phosphate of lime 2 - 12 
Phosphoric acid in combination with alkalies, calculated as) 1 „„„ 
tribasic phosphate of lime ) lo'JJ 
Soluble phosphates, calculated as tribasic phosphate of lime .. 10-11 
Insoluble phosphates '. 14-70 
Total amount of phosphates 30-81 
