Word: carbons
(lookup in dictionary)
(lookup stats)
Dates: during 1920-1929
Sort By: most recent first
(reverse)
...Holland Tunnel's greatest problem was not its construction, but its ventilation-how to avoid the poisonous carbon monoxide gas exhausted from motor trucks and cars. Ventilation experiments at Yale, the University of Illinois and the U. S. Bureau of Mines showed that more than four parts of the gas in 10,000 of air was dangerous. To prevent disaster absolutely Chief Engineer Holland installed 84 ventilating fans in four 10 story buildings, two on each side of the Hudson. Part of them blow fresh air into the tunnel floor through vents, others suck vitiated air through ducts...
...Before him chemists thought that they could make compounds only of inorganic elements, that organic growths depended upon a "vital principle." Berthelot reasoned that all chemical phenomena followed physical laws. In his laboratory he treated glycerin with certain acids and got fats, oils and butters. He combined hydrogen and carbon by means of the voltaic arc and got acetylene. "Berthelot condenses it [acetylene] under the action of heat and behold, we have benzine," writes Premier Poincaré in the current Chimie et Industrie, French periodical. "He adds hydrogen and behold, there appears ethylene, which, united with water, will produce alcohol...
...Carbon paper...
...subjecting large deposits of organic matter to centuries of subterranean pressure. But Dr. Hans Tropsch of the Kaiser Wilhelm Institute (Mülheim-an-der-Ruhr, Germany) gave hope that nature is still building oil stores, by another process. Germans have perfected processes of manufacturing synthetic fuel oils by heating carbon (bituminous coal, lignite) in a stream of steam or natural gas, in the presence of certain catalytics including iron. Germany's fuel-oil supply now seems assured as long as her coal lasts. Dr. Tropsch pointed out that natural gases collected from the crater of Mont Pelée were found...
Meteors, literally "things in the air," refer specifically to luminous bodies known as shooting stars, falling stars, fireballs, bolides. Traveling rapidly through the air, they generate intense frictional heat which burns up most of their material substance. Thus, they become "balls" of fiery gases and small particles of carbon, magnesium, sodium, etc. The explosion of a meteor is due to its rapid combustion in the dense atmosphere near the earth. It is estimated that some 20,000,000 meteors, which would be visible to the naked eye in the absence of sunlight, moonlight or clouds, enter the atmosphere every...