Word: carbons
(lookup in dictionary)
(lookup stats)
Dates: during 1940-1949
Sort By: most recent first
(reverse)
...Alice Hamilton, 78, longtime industrial health expert in the U.S. Department of Labor (now retired); for her lifelong crusade to protect U.S. workers against industrial poisoning hazards (silicosis, carbon monoxide...
Ever since the Pharaohs, men have been getting cleverer & cleverer at making imitation gems. Almost every precious stone now has a man-made twin. Last week the Linde Air Products Co. (a unit of Union Carbide & Carbon Corp.) announced that it had finally produced "star" sapphires and rubies...
Agriculture now believes it has the situation under control. Its bee scientists fasten a virgin queen in a small tube and drug her with carbon dioxide. After a while she lays a mass of unfertilized eggs, which can develop only into drones (another odd bee characteristic). The bee men rear these parthenogenetic males to maturity. Then they use one of them to inseminate artificially the same, still-virgin queen. Thereafter her eggs are fertile and develop into females (workers or queens) fathered by her own fatherless...
...other possibility was to construct a chain-reacting pile made of uranium combined with some substance to slow down the neutrons shot out by its fissioning atoms. Theory indicated that carbon or heavy water would serve as this "moderator." The U.S. used carbon (graphite), but the Germans decided it would not do. This was a bad mistake; it led them to use heavy water, which could be produced only by a slow and costly process...
...Bureau mounts its diamonds (which must be more colorless and flawless than good grade jewelry stones) between two small brass contacts. One contact is charged with 1,000 volts of electricity. When an alpha, beta or gamma ray hits the diamond, it knocks an electron off one of the carbon atoms of which the diamond is composed. Propelled by the pressure of the 1,000 volts, the electron darts along one of the straight channels which run between the atoms of a diamond crystal. This motion sets up an electrical pulsation that can be detected easily by various standard instruments...