On Bats' Guano. 65 
Chemical Composition of Bats' Guano. 
No. 
1. 
No. 
2. 
No. 3. 
No. 
4. 
27 
24 
23 
60 
64 '07 
12 
30 
'Organic matter of salts of ammonia 
5 
84: 
8 
26 
21 ^57 
30 
41 
5 
191 
/ 2i 
96 
1-60 
8 
33 
\ 23 
40 
1^42 
5 
91 
) 
10 
24 
♦ 
15 
2 
91 
4^19 
12 
58 
74 
6 
85 
1^68 
9 
97 
4 
92 
•33 
1 
26 
39 
•■ 
71 
43 
i 
02 
• 
• 
"•37 
80 
53 
•47 
i 
07 
52 
1 
59 
•30 
3 
69 
40 
•69 
45 
2 
30 
42 
19 
2 
15 
3-31 
16 
70 
100 
•00 
100 
00 
100^00 
100 
00 
•49 
•48 
2-91 
5 
37 
•59 
•58 
3-53 
6 
52 
t Equal to tribasic phosphate of lime 
54 
•49 
3-08 
18 
18 
A glance at the preceding analytical results shows that 
the composition of the four samples presents a wide range of 
differences. The samples No. 1 and No. 2, it will be seen, were 
fairly dry, but very poor in organic matter and ammonia. No. 1, 
likewise, was poor in phosphate of lime and in nitrates, and 
much contaminated with carbonate of lime, sand, and other 
worthless mineral matters. Altogether it was not worth re- 
moving, for it contained only 5 per cent, of phosphate of lime, 
about J per cent, of ammonia, and not quite 1 per cent, of nitric 
acid. The second sample contained about as much nitrogen in 
the form of organic matter as the first ; per cent, of nitric 
acid and an amount of phosphoric acid corresponding to per 
cent, of tribasic phosphate of lime. At the present market- 
value of manures, No. 2 would be worth about 11. a ton. 
The sample marked No. 3 was very wet, as it contained 
64 per cent, of water. Notwithstanding this large amount of 
water, it yielded on analysis 3J per cent, of ammonia and 3 per 
cent, of nitric acid, in round numbers ; and in a proper air-dry 
condition would be a valuable mauure. 
The fourth sample, it will be seen, was the driest of all, and 
the richest in nitrogenous organic matter, salts of ammonia, 
and nitric acid. It contained 5^37 per cent, of organic and am- 
moniacal nitrogen, equal to 6J per cent, of ammonia and 9J 
per cent, of nitric acid, corresponding to 17^19 per cent, of 
VOL. XIV. — S. S. F 
