Word: iwanowski
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Dates: during 1937-1937
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Late in the 19th Century a Russian named Iwanowski demonstrated the existence of an infectious something smaller than bacteria by passing a solution from diseased tobacco plants through a Chamberland filter. In time it was found that many animal and human diseases were also due to such viruses: rabies, distemper, foot-and-mouth disease, encephalitis, poliomyelitis, measles, yellow fever, certain tumors, common colds. At Princeton Dr. Stanley grew acres of tobacco plants, infected them with the disease known as tobacco mosaic, ground up their wizened leaves, extracted their juices. This liquid was highly infectious to normal plants. But the deadly...
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