Word: element
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...mineral timepiece scientists have used uranium-lead, which is one of the "dead" end-products remaining after the radio-active element uranium has spent its ray energy...
...valuable new secret about ordinary lead, which has been kept from scientists by a peculiar feature, is that the relative proportions of the isotopes of this metal vary from sample to sample. Isotopes are atoms of the same element which differ in weight...
Technically known as a mass spectrometer, Dr. Nier's instrument is designed to detect the presence of rare isotopic forms and also to give the most accurate measures even made of the relative abundance of different isotopes present in an element...
...that the Committee's report is entirely unbiased, particularly in its finding that the President's rejection of the recommendation was not due to any prejudice against the social and economics views of Drs. Walsh and Sweezy, and on the whole through. Nonetheless, in its disregard of the financial element involved--which seems to be the touchstone of the affair--and in its careless statement that the President's ruling concerning the promotion of instructors in Economics "subordinated educational values to financial exigencies," the Committee destroyed its own case. There is little doubt that Mr. Conant's fears...
...hall the Harvard sweepers as sprint champions of the East is the significance of their consistently slow stroke over the short distances. Although the Elis flashed by Cornell to cast grave doubts on the Bollesmen's mythical title, sportsmen are picking the Chace-paced eight to come into its element in the long distance stretch at New London...