18 
Table IV. — Analyses of guanos, with their approximate values — Continued. 
Lar> 
ora- 
tory 
No. 
Name or location of 
cave. 
Description. 
Total 
nitro- 
gen 
(N). 
Nitro- 
gen as 
am- 
monia. 
Nitro- 
gen as 
ni- 
trate. 
Total 
phos- 
phoric 
acid. 
(P 2 o 5 ). 
Water- 
solu- 
ble 
phos- 
phoric 
acid. 
Ci- 
trate- 
solu- 
ble 
phos- 
phoric 
acid. 
Ap- 
prox- 
imate 
value 
per 
dry 
ton. 
1051 
"Jesus Torres," Barrio 
Lares, Lares: 
P.ct. 
1.51 
1.13 
.75 
.33 
5.69 
1.96 
1.70 
.62 
2.14 
2.00 
2.34 
1.69 
.97 
1.22 
P.ct. 
0.15 
P.ct. 
0.66 
P.ct. 
24.22 
20.87 
1.52 
4.83 
4.98 
5.12 
Trace. 
10.36 
15.28 
7.26 
14.68 
16.98 
4.63 
19.94 
P.ct. 
P.ct. 
4.84 
1.75 
.42 
3.01 
2.58 
3.80 
$8.78 
4 01 
1052 
1053 
"Cerro de Jose Cruz," 
Barrio Lares, Lares; 
mouth of cave. 
"Clara" and " Oscura," 
Barrio Guayabal, 
Juana Diaz; sections 
I, III, and V. 
"Callo," Barrio Vil- 
lalba Arriba, Juana 
Diaz. 
"Naranjo," Barrio Na- 
ranjo, Juana Diaz: 
Surface to 1ft 
Surface to 2 ft 
Surface to 1 ft 
Surface to 6 in 
Surface to 3 ft 
Surface to 3 ft 
do 
do 
do 
do 
Surface to 2 ft 
1.92 
3 67 
1072 
1073 
1074 
.06 
.04 
.73 
.11 
10.64 
6 21 
1075 
3 40 
1077 
"Los Santos," Barrio 
Vega Redonda, Com- 
eno: 
4.49 
5.42 
3.61 
3.16 
8.46 
2.16 
9.99 
6 73 
1078 
1079 
1080 
1081 
Section B 
"La Mora" or 
"Iglesia," Barrio 
Vega Redonda, Com- 
erio: 
Section A 
Section B 
Section C 
" Guaraguao," Barrio 
Vega Redonda, Com- 
edo. 
"Flori," Barrio Pue- 
blo Viejo, Pueblo 
Viejo. 
.04 
.03 
.02 
.34 
.75 
.26 
8.70 
7.95 
6.34 
11.84 
1082 
4.10 
1104 
12.43 
Determinations were also made of the water-soluble potash in 
samples which, on account of their character or location, were likely 
to contain appreciable amounts. The results are given in Table V. 
Table V. — Water-soluble potash in certain guanos. 
Water- 
Water- 
Water- 
Water- 
Laboratory 
soluble 
Laboratory 
soluble 
Laboratory 
soluble 
Laboratory 
soluble 
number. 
potash 
(K 2 0). 
number. 
potash 
(K 2 0). 
number. 
potash 
(K 2 0). 
number. 
potash 
(K 2 0). 
Per cent. 
Per cent. 
Per cent. 
Per cent. 
773 
0.78 
833 
Trace. 
855 
1.59 
881 
4.15 
777 
.23 
841 
1.56 
858 
1.58 
885 
.73 
780A 
1.34 
842 
2.82 
860 
1.29 
935 
.97 
786 
.43 
846 
1.36 
876 
1.83 
938 
.28 
799 
.75 
851 
.84 
878 
2.71 
977 
3.22 
819A 
1.83 
852A 
3.90 
879....:... 
3.48 
978 
.76 
828 
1.48 
854 
.84 
880 
4.18 
982 
Trace. 
The potash in the other samples, with possibly a few exceptions, 
can be taken as negligible. Table III showed about the quantity 
of potash that could be expected in the ordinary guano. 
