. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 1923. Pineapple plantation in Porto Rico. mean annual temperature as low as 72° F. Serious storms occur, and occasional earthquakes, but the latter are not violent, doing but little damage. The annual rainfall at San .Tuaii averages 60 inches, about the same as at New Orleans, and nearly two-thirds of this fall
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 1923. Pineapple plantation in Porto Rico. mean annual temperature as low as 72° F. Serious storms occur, and occasional earthquakes, but the latter are not violent, doing but little damage. The annual rainfall at San .Tuaii averages 60 inches, about the same as at New Orleans, and nearly two-thirds of this falls in the summer and autumn. The annual relative humidity at the capital is very high, averaging not far from 80 per cent. The annual rainfall increases eastward from San .luan, until near the northeast corner of the island it exceeds 100 inches. It increases also upon the high- lands of the interior, reaching a maximum upon the di- viding ridge of nearly 100 inches. The south slope of the island, on the other hand, is much drier, both rain- 1924. Tomato-growine in Porto R The plants are tied to cor supported on fall and atmospheric moisture being less, so much so that in some regions irrigation is necessary for cultiva tion of crops. Owing to the fact that Porto Rico has for centuries maintained a dense population almost entirely supported by agriculture, a large portion of its surface is under cultivation, and only a trifling proportion remains in its natural condition. Hence little of its vegetation is in- digenous. The native fauna of the island is, owing to the same cause, very limited. There are no large mam mals except such as are domesticated. It is said that there are no noxious reptiles and few insect pests. Of the total area of Porto Rico —3,606 square miles — 2,7^3 square miles were included within farms. This is 76 per cent, or more than three-fourths of the area of the island. The area under cultivation was 747 square miles, or not less than 21 per ce
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