In the course of two previous investigations, published by Moore and Williamsl, in 1909 and 1910, it was shown that while certain microorganisms are indifferent to amounts of oxygen lying between the atmospheric value and a full atmosphere of oxygen at ordinary barometric pressure, others, notably Bacillus tuber-culosis and Baccillus pestis, are very sensitive to oxygen, and cease to grow when the percentage of oxygen exceeds about seventy per cent. of 760 millimetres.
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Alfred Adams (1912) studied this question.