Word: carbonization
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Dates: during 1930-1939
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...Tone and Edward Goodrich Acheson made emery wheels obsolescent. An impure oxide of aluminum, emery was used for grinding in the time of the Pharaohs, was still the best abrasive industry had until 1891. In that year Acheson, looking for an artificial abrasive, found on the tip of a carbon electrode a few bright specks of an unknown substance. This, he discovered, was hard enough to cut glass and, when applied with oil to a wheel, would cut the face of a diamond tool. Acheson called the stuff "carborundum," because he thought it was composed of corundum and carbon before...
...terrific shock to a baby. The mother and obstetrician, says Dr. Kugelmass, should not rush the act. If the baby does not breathe at once, he should not be slapped, tumbled or doused with cold water. Let him lie still, on his back, and receive a little carbon-dioxide gas mixed with oxygen. Any observable deformity (harelip, club feet, etc.) should be mended during the first month or two. Floppy ears will often set if merely held close to the head with adhesive plaster...
...work." "All 1 need to know is the name of the course, the special subject of the theme, the grade desired, and a tentative reading list if you have one. I send the study to you typewritten, complete, carefully footnoted, ready to submit to the professor, and a carbon copy for your own use." "Steady customers are always given the preference...
Technically, a machine tool is a power-driven, non-portable instrument that removes metal in the form of chips. One of the indices of machine tool efficiency is the amount of metal chipped per minute. Up to 1900, with old-fashioned carbon steel tools, about one-quarter of a pound of metal could be cut in 60 seconds. Today, using tools tipped with cemented carbides, the chips fall at the rate of 17 lb. per minute. Carbides are crystalline substances so hard that they will machine glass...
...ruined merchandise and cleaning buildings, much of the rest for damage to lungs and respiratory tracts. Salt Lake City's smoke problem is especially acute because the city lies in a natural bowl whose rim tends to keep the pall from dispersing. Metallurgical coke and petroleum carbon, supposedly "smokeless," have been tried there without success. The problem can be solved by treating bituminous coal with superheated steam at 1,000 to 1,400° F., driving off the smoke-producing ingredients. Cost of treatment...