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Scientific American, Vol. 83, No. 8 (1900) (1900)

leaf 10

An illustration from Scientific American, Vol. 83, No. 8 (1900), 1900, leaf 10
harvesting, curing, ete. I had it flattened out to what you see, just in the buckets or basins, holding them in the smoke after The first knowledge of rubber is said to have been each dipping, until the successive films of rubber state in which gold-beaters use in the manufacture of secured through… … 11 ounces when it chiefly in the trop- was put into the ical zone. The erucible, now it rubber trees on weighs nearly 5 ounces. These products prove most the Amazon rise without branches to a height of from therefore, represents the slow and laborious accumula- conclusively the value of residues.…

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