. Cyclopedia of farm crops, a popular survey of crops and crop-making methods in the United States and Canada;. Farm produce; Agriculture. RUBBER RYE 559 planned, however, between quicker-growing kinds, to come in later in case of the exhaustion of earlier-maturing kinds. The tree has attained large size at considerable elevations in the West Indies,. Fig. 797. Tapping rubber trees. where a lower temperature prevails than on the plains. In Trinidad it grows at elevations of 130 to 500 feet above sea level. Funtumia was for- merly known as Kickxia. (Hart.) West African rubber (Landolphia spedes
. Cyclopedia of farm crops, a popular survey of crops and crop-making methods in the United States and Canada;. Farm produce; Agriculture. RUBBER RYE 559 planned, however, between quicker-growing kinds, to come in later in case of the exhaustion of earlier-maturing kinds. The tree has attained large size at considerable elevations in the West Indies,. Fig. 797. Tapping rubber trees. where a lower temperature prevails than on the plains. In Trinidad it grows at elevations of 130 to 500 feet above sea level. Funtumia was for- merly known as Kickxia. (Hart.) West African rubber (Landolphia spedes). There are several species of this genus which yield rubber of good quality, but which do not respond readily to cultural treatment. They are for the most part high-climbing plants requir- ing the support of trees. The latex or rubber coagulates almost as soon as it exudes. It may be formed into rubber by smearing on a smooth sur- face. It is related that in Africa native collectors use their arms for this purpose, cutting off the accumulated material when it becomes sufficiently large to inconvenience their working. It may be assumed with some certainty that Landolphias are unlikely to compete with Hevea, F'icus, Castilloa or Manihot. (Hart.) Balata gutta-percha (Mimusops globosa). This tree is a native of the forests of Trinidad and South America, and is ex- ported in large quantities, via Trinidad, from the mainland. The tree affords one of the most useful hard-woods known. It is especially valuable for railway sleepers and for building purposes because of its durability. It grows to a large size, both in virgin forest and under cultivation. Its produce is of the nature of gutta-percha and melts in hot water. No attempt at cultivation on a large scale has yet been made. The tree produces a small edible fruit, deliciously sweet, which is sold largely in local markets when in season. The tree takes some thirty or more years to reach full maturity. The seed soon loses its vit
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