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Updated: May 19, 2025
In this way Engelmann was able to determine the evolution of oxygen by Euglena and by chlorophyl granules. By H SCHAEPPI. Ten grms. of sulphur, pulverized as finely as possible, are covered with hot water and a few drops of nitric acid digested for some time, filtered, and washed till the washings have no longer an acid reaction.
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