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Word: cuprous (lookup in dictionary) (lookup stats)
Dates: during 1930-1939
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Usage:

...duplicate its composition. The synthetic rubber which grew out of the Nieuwland researches is 40% chlorine, not an ingredient of natural rubber at all. At a chemistry symposium in Rochester, during the winter of 1925, Father Nieuwland read a paper on the formation of divinyl acetylene from acetylene and cuprous ammonium chloride. Du Font's Dr. Elmer K. Bolton was there, suspected that if the monovinyl could be similarly produced, artificial rubber was at hand. Acetylene, from common coke and lime, is cheap...

Author: /time Magazine | Title: Science: Tercentenary | 5/6/1935 | See Source »

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