e steam and_ will of the acid have an im- form little bubbles in the portant effect on the quali- rubber, thereby causing ty of the refined product, porous places. Further but the question of tem- than this, certain of the perature, which the author poorer grades of rubber considers of equal… … who employ chemists can the difficulties accompany- very easily tell whether ing the process of purifica- their compounds are such tion, i. e., at the lower tem- that will develop gases during vulcanization, and perature the rate of clarification increased with the the source of a puncture or leak.…
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