Word: radiumator
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...rich radium deposit is one which yields 90 to 120 milligrams (.00315 to .0042 oz.) nearly pure radium bromide salt per ton of concentrated ore (50 tons of crude ore). From ore bodies of such richness in northwestern Canada the refining plant is able to extract one gram of commercially pure radium from 550 tons of mined ore. A San Diego mining engineer and chemist named F. S. Kearney, now working in Mexico, assayed Mrs. Bishop's ore at 130 milligrams of radium per ton. This high figure, Mrs. Bishop said, was confirmed when she sent a sample...
...radium discovered in 1898 by Pierre and Marie Curie was laboriously extracted from a radioactive mineral called pitchblende, found in what is now Czechoslovakia. For years those deposits remained the only source of the world supply. Then a radium-bearing ore, carnotite, was discovered in Utah and Colorado. This was a low-grade ore but with the help of the U. S. Bureau of Mines and several corporations, the U. S. became the biggest radium-producing country, at one time turning out 80% of world production. Between 1912 and 1922 the U. S. produced more than 170 grams. In those...
...yellow, pink and green, recognized it as pitchblende. Surveys and assays showed that the deposit was rich and copious. In 1933 a refining plant was completed at Port Hope on Lake Ontario, 3,500 miles away. The Great Bear Lake find broke the Belgian monopoly, reduced the price of radium to its present level of $25,000 per gram. Few months ago Canada celebrated production of its first ounce of radium...
...Modern radium extraction is a highly complex process, started with big ovens, reaction vats, filter presses and decanters, working down to delicately controlled processes in vessels hardly larger than thimbles. When the concentration of radium is as high as 1%, trained chemists take over the job, wearing protective gloves and clothing and working intermittently to avoid injury from the potent gamma, beta and alpha rays. The final product is not pure radium but 90 to 94% pure radium bromide...
Present rate of production for M. Pochon and his staff is 3½ grams of commercially pure radium bromide per month. This rate is expected to be tripled at the end of 1937 when installation of new equipment is completed. To estimate how well this enlarged output would be absorbed by U. S. hospitals, M. Pochon recently visited the U. S., asked 103 hospitals how much radium they had on hand, how much they thought they would need in the future. Answers showed a combined holding of 51,895 grams, prospective need of 47,470 grams more. Where the hospitals...