Word: bacteria
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Dates: during 1930-1939
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...Like bacteria in water, myriads of thoughts and memories swarm unnoticed in the drop of intelligence under every man's skull. Unlike bacteria, however, they are brought to a man's attention less by microscopic examination than by some serious shock to the tenor of his ways. Then the myriads of thoughts & memories rush helter-skelter every which way: they have strange encounters, make strange marriages. If they absorb too much of the man's attention...
Nature provides us with mechanisms which in many cases aid in overcoming disease, especially those caused by bacteria, Professor Greenough explained...
...Hrelle described the existence of something, invisible to microscopes, which seemed to feed on and alter the existence of various types of disease bacteria. He called this something a phage. Last week after innumerable experiments whither he was beguiled from Egyptian researches, he was prepared to restate his original, but widely questioned belief that a phage was not a chemical but a living organism. A disease germ attacked by a phage goes mad. Its heredity changes; it usually becomes harmless. Unfortunately, some phaged germs develop into something even more virulent...
...proven that microbes cause disease, contentious Robert Koch (1843-1910) had scarcely demonstrated how to cultivate germs, when in 1884 Dr. Smith -who was then only 25, and the late Dr. Daniel Elmer Salmon (1850-1914) who was then 34-proposed creating immunity against disease with products of the bacteria which caused the disease. With this idea they immunized pigeons against hog cholera. Their method rationalized the whole subject of vaccination. It promptly led to the invention of diphtheria antitoxin...
...This tooth brush business is not the game, brushing teeth is to remove bacteria deposits. I began my experiments with bacteria. Didn't prove a thing...