The Care of the School Child, a Course of Lectures Delivered Under the Auspices of the National League for Physical Education And Improvement, May to July, 1916
The book The Care of the School Child, a Course of Lectures Delivered Under the Auspices of the National League for Physical Education And Improvement, May to July, 1916 was written by author Kerr, James, 1862-1941 Here you can read free online of The Care of the School Child, a Course of Lectures Delivered Under the Auspices of the National League for Physical Education And Improvement, May to July, 1916 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Care of the School Child, a Course of Lectures Delivered Under the Auspices of the National League for Physical Education And Improvement, May to July, 1916 a good or bad book?
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Speaking generally and in contrast to the resist- ance which spores show to destructive agencies, these bacteria are not very resistant. Sunshine, fresh air, desiccation, chemicals, and heat are fatal to them. The filterable organisms, which are generally known as ultra-microscopic, though they are not all ultra-microscopic in the several stages of their INFECTION IN AND OUT OF SCHOOL i6i existence, are regarded as giving rise among other diseases to typhus fever, smallpox, measles, scarlet f e...ver^ and mumps . They are destroyed by heating to 50-70° C. for ten minutes. They survive drying and resist the action of glycerine. It is interesting to note that many of these filterable organisms are spread by means of intermediate agencies such as insects. For example, the infec- tion of yellow fever is transmitted by a mosquito and typhus fever by the body louse. We must therefore regard infection as a living particulate body which can be recognized by means of the microscope in many instances.
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