15 
Table IV. — Analyses of guanos, with their approximate values — Continued. 
Lab- 
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 5 ). 
Water- 
solu- 
ble 
phos- 
phoric 
acid. 
Ci- 
trate- 
solu- 
ble 
phos- 
phoric 
acid. 
Ap- 
prox- 
imate 
value 
per 
dry 
ton. 
918 
"San Miguel," Barrio 
Cabachuelas, Moro- 
vis: 
Section A 
Surface to 8 ft. in 
southeast corner. 
Floor, 5J ft. below 
918. 
Floor, surface to 1 ft. 
Surface to 2 ft 
Surface to 3 ft 
3 in. to 3f ft 
P.ct. 
0.90 
.11 
.19 
.13 
.20 
.73 
.51 
.15 
.16 
.25 
2.75 
.31 
.11 
.80 
.89 
8.92 
.48 
3.32 
1.13 
.78 
1.59 
3.08 
.21 
3.01 
.59 
.68 
.72 
1.28 
.60 
.27 
2.34 
.71 
.23 
.18 
.06 
.52 
1.06 
.23 
.55 
P.ct. 
P.ct. 
P.ct. 
4.41 
1.19 
4.69 
1.82 
2.26 
33.64 
37.44 
30.21 
8.87 
36.90 
12.09 
9.92 
6.12 
27.57 
28.66 
5.78 
22.84 
6.81 
21.87 
14.11 
12.55 
24.48 
5.59 
5.29 
23.88 
23.39 
22 62 
P.ct. 
P.ct. 
1.52 
.21 
2.90 
$3.32 
919 
Do 
.43 
920 
Section B 
"LaChiquilla," Barrio 
Cabachuelas, Moro- 
vis: 
Section A 
Do 
3.28 
921 
922 
1.00 
6.64 
10.77 
2.70 
1.25 
8.11 
3.76 
2.10 
1.00 
9.08 
6.99 
1.62 
1.26 
4.17 
6.80 
5.24 
3.74 
6.45 
.80 
3.40 
2.42 
2.58 
2.56 
9.71 
.64 
5.96 
2.87 
1.40 
2.94 
1.50 

14.92 
2.77 
21.64 
2.95 
13.18 
1.40 
923 
"Oscura," Barrio Ca- 
bachuelas, Morovis: 
Section A 
Do 
3.14 
924 
3in. to 4^ ft 
11.79 
925 
Section B 
3in. to6ift 
3.00 
926 
Section C 
3 in. to 5\ ft 
1.57 
927 
Do 
3 in. to 4f ft . . . 
8.61 
928 
929 
Sections A, B,C... 
"Capa Prieta," Barrio 
Cabachuelas, Moro- 
vis. 
Do 
Surface to 3 in 
Surface to 6 in 
6 in. to 2 ft 
6. 05 j 6. i9 
5.16 
2.72 
930 
1.22 
931 
"Pablo Clas," Barrio 
Cabachuelas, Moro- 
vis: 
Section A 
Surface to 7 ft 
do 
10.15 
932 
Section B 
7.23 
933 
"Toronja," Barrio de 
Cabachuelas de Tor- 
recilla, Morovis: 
Section A 
Surface to 2 ft 
3 in. to 2\ ft 
.01 
.07 
10.78 
934 
Section B 
2.22 
935 
Sections B and C . . 
Section C 
Upper 3 in 
.10 
1.59 
.79 
13.53 
936 
3 in. to 3f ft 
11.47 
937 
"Cerro Hueco," Bar- 
rio de Cabachuelas 
de Torrecilla, Mo- 
rovis: 
Section A 
Surface to 2 ft 
Surface to 18 in 
Surface to 2 ft 
Surface to 18 in 
Surface to 2 ft 
Surface to 3 ft.a 
do.6 
Surface to 18 in.& 
do.a 
Surface to 3 ft. e 
Surface to 8 ft .a 
Surface to 1 ft 
1 to 2 ft 
6.80 
938 
Section B 
.02 
.13 
i. 14 
.34 
9.09 
939 
Section C 
9.19 
940 
"De los Puercos," Bar- 
rio Cabachuelas, Mo- 
rovis. 
"Alta," Barrio Caba- 
chuelas, Morovis. 
"Archilla," Barrio 
Cabachuelas, Moro- 
vis: 
Section A 
1.22 
941 
942 
.31 
.36 
8.42 
3.60 
943 
Do 
Section C 
3.70 
944 
4.00 
945 
Do 
Section D 
21.11 
2.32 
39.65 
13.33 
946 
1.84 
947 
" Escalera," Barrio Ca- 
bachuelas, Morovis. 
"Convento," Barrio 
Hato Viejo Poniente, 
Ciales: 
Section A 
4.51 
952 
.04 
.12 
7.49 
34.02 
5.68 
953 
Do 
2.81 
954 
Do 
Surface to 1 ft 
do 
26.91 ! 
29.53 
3.40 
955 
Section B 
Section C (hole C-l) 
Section C (holes 
C-3 to C-6). 
Section C (hole C-4) 
Do 
.. . . - 
.95 
956 
41.58 
31.85 
4.05 
34.13 
5.56 
.12 
957 
Surface to 3 ft 
Surface to 2 ft 
2 to 4 ft 
11.87 
958 
4.89 
959 
11.72 
960 
Section C (hole C-7) 
Section C (hole C-8) 
Surface to 1 ft 
do 

4.15 
961 
.99 

14.97 
9.32 
a Border of guano still in place. 
b Guano turned over to extract intermediate black layer. 
c Dirt through which passageway has been cut for pack horses to pass in and out of cave. 
