. India rubber world. Hevea at El Palmer Estates, trees, now six years in position—forms in part the subject absent in Hcvca. tho growing in the same localities, of these notes. These Hcvea trees have grown vigorously Briefly then, insofar as plantings, either upon a practical or and are in the best of health. The accompanying photo- experimental scale, have been made, the trees leave nothincr graphs will convey some idea of them, and of others herein to be desired in their general aspect of growth and health- 8 THE INDIA RUBBER WORLD [October 1, 1913. fullness, till) upon th-e whole
. India rubber world. Hevea at El Palmer Estates, trees, now six years in position—forms in part the subject absent in Hcvca. tho growing in the same localities, of these notes. These Hcvea trees have grown vigorously Briefly then, insofar as plantings, either upon a practical or and are in the best of health. The accompanying photo- experimental scale, have been made, the trees leave nothincr graphs will convey some idea of them, and of others herein to be desired in their general aspect of growth and health- 8 THE INDIA RUBBER WORLD [October 1, 1913. fullness, till) upon th-e whole it is doubtful if the growth isquite as rapid as in equatorial regions lacking a well markeddry season; and upon this point it may not be doubted thatthere are compensations, as during a fairly well marked dry. JlczCa Tkee in Garden at El Palmer. season many forms of mycelium and various bacteria! germsare destroyed or reduced to a minimum, while bark formationis relatively solidified and wounds heal with less liability torot, thus reducing the risk of insect or other attack upon thecortex. Tapping was commenced upon the few trees of sufficientsize—varying in circumferential measurement from 19 to 26inches at 2yi feet above ground—the early part of April ofthis current year, and I am sending you samples of the rubber—I believe the first Hci-ea rubber produced in Mexico. Single half spiral excisions embracing one-half of the cir-cumference of the trees have been worked, daily parings fromthe lower wall of the excisions having been made, on thebasis of thirty parings to the inch of bark removed. It mustbe admitted that this degree of expertness was not attaineduntil some little practice was had. The now well-knownphenomenon of wound response, commencing with an in-appreciable quantity of
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