South America—
Peru.—In various islands off the coast—viz., Chincha, Guanape, Ballestas, Macabi, Lobos, and Patillos; and on different parts of the coast—viz., Pabellon de Pica, Chipana, Huanillos, Punta de Patillos, Indiependence Bay, and Lobos de fuera.
Columbia.—In different parts of the States of Venezuela, New Granada, and Ecuador. Guano coming from these parts is often known as Columbian guano, or according to the name of the State in which it is found. Maracaïbo and Monks guanos come from the coast of Venezuela. Deposits are also found on the Galapagos Islands, to the west of Ecuador.
Bolivia.—Mejillones, Patagonia, Leon's.
North America—Deposits have been found on the coasts of Mexico and California; on the Raza and Patos Islands; and on the coasts of Labrador. They have also been found on the Islands of Curaçao, Aruba, and Navassa in the Gulf of Mexico.
Africa—On the west coast deposits have been found at Algoa Bay, Saldanha Bay, and on the Island of Ichaboe.
Australia—Shark's Bay and Swan Island.
West Indies—Sombrero, Aves, and Cuba.
Pacific Ocean—On the Islands of Baker, Jarvis, Howland, Malden, Starbuck, Fanning, Enderbury, Lacepede, Browse, Huon, and Surprise.
Asia—Deposits at Kuria Muria on the Arabian coast, and on the Sandwich Islands. (See Heiden's 'Düngerlehre,' vol. ii. p. 349.)

NOTE III. (p. 303).

Composition of Concretionary Nodules.

(Analyses by Karmrodt.)

No. 1
Potassium sulphate7.49
Potassium phosphate9.52
Sodium phosphate9.08
Ammonium phosphate7.57
Calcium sulphate3.40
Ammonium urate4.09
Ammonium oxalate41.28
Nitrogenous organic matter10.17
Water 7.40
100.00
Nitrogen - 14.84
No. 2
Potassium sulphate45.64
Sodium sulphate13.22
Ammonium sulphate10.23
Ammonium oxalate9.14
Basic ammonium phosphate12.09
Precipitated ammonium phosphate4.78
Organic matter.94
Insoluble1.90
Water 2.06
100.00

NOTE IV. (p. 306).

The following analyses, being the average of a large number of different samples analysed from time to time in the chemical laboratory of the Pommritz Agricultural Experimental Station, show the gradual deterioration of Peruvian guano, as regards its percentage of nitrogen, during the years 1867-81:—

Nitrogen.
186713.16
186811.98
186913.66
187012.37
187110.04
187210.72
18739.16
18749.83
18787.10
18796.95
18807.07
18816.93

NOTE V. (p. 309).