Word: harmless
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Dates: during 1940-1949
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...found that it killed bugs. Its first test came during a plague of potato beetles in Switzerland in 1939. DDT stopped the beetles dead. Concentrated DDT is toxic to men and animals when swallowed, but in the weak dilutions used for sprays and dusts, it has been found harmless to the skin...
...Idea. One idea ran through all his work: he would look for some naturally occurring bacteria-fighter (new term: antibiotic substance) that would not harm animal tissue. The first antibiotic Dr. Fleming found was lysozyme. It occurs in tears and egg white, can dissolve some bacteria, most of them harmless. That was in 1922-six years before the day when he first saw and grasped the meaning of the sterile ring around the penicillium mold...
...harmless little comedy larded with bits of homey philosophy and sad-eyed sentiment, But Not Goodbye merits no worse charges than that most of it is dated and much of it is dull...
...Institute, he first used ferrets to prove that influenza is solely a virus disease. (So far, two viruses have been identified, type A and type B.) In 1941 Dr. Francis found that many people with colds or hay fever have a substance in their noses which makes the virus harmless. He also found that, at least for a while, people who have recovered from flu have protective substances in their blood...
...made his discovery when cattlemen in North Dakota and Canada complained that some of their stock died from bleeding scratches and bumps, like human hemophiliacs. He found the guilty chemical in spoiled sweet-clover hay, named it Dicumarol because it is formed from the harmless chemical, coumarin, which gives fresh clover its smell. The cows' problem was solved by planting clover with a low coumarin content...