LLUSTRATIONS. 



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Plate I. Planted Castilla trees, about 14 years old Frontispiece 



II. Cervantes' original engraving of Castilla 86 



III. Tip of branch of Castilla, eastern Guatemala 86 



IV. Staminate flowers and base of leaf of Castilla, eastern Guatemala 86 



V. Staminate flowers and tip of leafy branch of Castilla, Soconusco, 



Mexico 86 



VI. Pistillate and staminate flowers of Castilla, Soconusco, Mexico 86 



VII. Ripe fruit of Castilla, Soconusco, Mexico 86 



VIII. Planted Castilla tree, 18 months old 86 



IX. Large Castilla tree grown from fence stake , 86 



X. Self-pruned branches of Castilla 86 



XI. Bases of self-pruned temporary branches of Castilla 86 



XII. Five Castilla trees standing together, Soconusco, Mexico 86 



XIII. Yearling Castilla tree planted in the open, eastern Guatemala 86 



XIV. Yearling Castilla tree planted in shade, eastern Guatemala 86 



XV. Thinly shaded Castilla plantation, 18 months old " 86 



XVI. Native method of tapping Castilla 86 



XVII. Native method of coagulating latex. Fig. 1. — Spreading latex on 

 Calathsea leaf. Fig. 2. — Pressing two coated leaves together. 

 Fig. 3. — Pulling the leaf from the rubber. Fig. 4. — Finished 



sample of rubber 86 



XVIII. Fig. 1. — Rubber coagulated by juice of moonvine. Fig. 2. — Branches 

 of Castilla with ripe fruit. Fig. 3. — Base of tree injured by 



tapping 86 



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