Word: gram
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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...
...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 early days the price ranged around $110,000 per gram...
...mother country for refining. The U. S. with its low-grade carnotite could not compete and soon dropped out of the world picture. The Belgian company enjoyed what amounted to a monopoly, producing just enough to fill the demand at its arbitrarily maintained price of $70,000 per gram. Since the medicinal uses of the element were rapidly expanding, grumblings were heard from other nations that the Belgian monopoly was cruelly greedy, especially since the cost of processing the African ore, exclusive of actual digging costs and overhead, was estimated to be not more than $10,000 per gram...
...same principle underlies a technique, explained last week, for ferreting out defects in thick masses of steel. At the convention of the American Society for Testing Materials in Manhattan, Physicist E. V. Lange of Radium Chemical Co. demonstrated with a capsule containing one-tenth of a gram of radium. Gamma rays shooting out at a million or more volts passed through steel castings a foot thick, photographed the interior structure on X-ray films 10 by 12 in. in size. Tested by this method are steering posts of ships, turbines, valves, high-pressure steam pipes. Dr. Lange reported that...
...short years ago mathematical builders of the universe got along with two fundamental particles, the proton and the electron. The proton was the nucleus of the simplest atom, hydrogen. It had a charge of positive electricity and its mass was .0000000000000000000000166 gram. The electron, which in the hydrogen atom throbbed alone around the nuclear proton, had a negative charge matching the proton's positive charge and its mass was 1,847 times less than that of the other particle. The more complex atoms of other elements were constructed from various combinations of electrons and protons...