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By E. A Steinhaus

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Nota preventiva. Boll. ist. sieroterap. , 7, 665-670. , and Fortuna, Ε . 1931. L a vaccinazione dei bachi da seta. II. Nota preventiva. Boll. ist. sieroterap. , 10, 92-102. , and Fortuna, Ε . 1932. L a vaccinazione dei bachi da seta. Terza nota preventiva. Boll. ist. sieroterap. , 11, 204-210. Doull, Κ. M. 1961. A theory of the causes of development of epizootics of nosema disease of the honey bee. / . , 3, 297-309. Dubos, R . 1959. "Mirage of Health," 236 pp. Harper, New York. Durham, R. H. 1960.

A theory of the causes of development of epizootics of nosema disease of the honey bee. / . , 3, 297-309. Dubos, R . 1959. "Mirage of Health," 236 pp. Harper, New York. Durham, R. H. 1960. "Encyclopedia of Medical Syndromes," 628 pp. Hoeber (Harper), New York. Eckert, J . E . 1960. Some fundamentals of the chemotherapy of foulbrood bee diseases. Am. , 100, 221-223. Eckert, J . E . 1961. Acarapis mites of the &o*iey bee, Apis mellifera Linnaeus. / . Insect Pathol, 3, 409-425. Eckert, J . E . , and Shaw, F .

Bailey (1955) has recorded that sealed silos with a total capacity of 850,000 tons of grain have been built in Argentina and that these operate very efficiently. He has demonstrated that death of grain insects is caused by 0 2 depletion, not by C 0 2 accumulation as has been claimed. Insects can lower the partial pressure of 0 2 to a remarkable extent, for Sitophilus granarius (Linnaeus) were not all killed until the 0 2 tension had decreased to 2 percent and C 0 2 had increased to 40 percent of the volume of the gases in sealed containers.

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