Word: latex
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Dates: during 1920-1929
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...Eastern Guatemala, Dr. Samuel J. Record discovered a tree never before known to science, named it the cow tree. From its bark, when slit, issues a creamy white latex, delicate in taste, nourishing to man and beast...
Formerly all crude rubber was obtained from the rubber trees by coagulating the sap or " latex" with either smoke or chemicals; inevitably this method left impurities in the product, and sometimes when acids were employed valuable qualities of the original latex were destroyed. But by the new process, the latex is sprayed into a snow-white mist which, placed in contact with superheated air, is deprived of its water, but nothing else. Thus " sprayed rubber" is absolutely pure virgin rubber, remains dry indefinitely, is much stronger than ordinary "crude rubber " and-unlike the latter-is completely uniform in quality...