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Show Working to Compute Mass of the Earth Dr. Paul U. Heyl of the bureau of standards in Washington is again busy on one of the most difficult problems in physics to determine still more accurately ac-curately the constant of gravitation, which, in turn, will enable scientists to measure the weight of the earth and deduct its composition. For several centuries there have been experiments in this direction. But only last year Doctor Heyl, after prolonged and most delicate experimentation, experi-mentation, succeeded m giving to the world a precise constant of gravitation. gravita-tion. Now he is bent on even greater accuracy. The new observations will be carried on in a small laboratory 35 feet underground, so tJiat temperature tempera-ture changes may be avoided, as well as the .horizontal attracting forces of moving objects on the earth's surface. It will take several months of the most careful work with a torsion balance, bal-ance, massive steel cylinders and tiny glass balls to compute and complete the fresh series of observations. |