Word: earthed
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Dates: during 1920-1929
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...Jeans-Jeffries Theory of Earth Origin", Professor Mather, Geology Lecture Room...
...Smith began to sing - every song she could remember. That was not insouciance at the moon's stare but a way of keeping warm and awake. By and by the moon set. After 13 hr., 16 min., 45 sec. in the air alone, Record-Holder Smith returned to earth. Endurance records by women, qua women, have no official standing...
...Planetesimal Hypothesis of Earth Origin", Professor Mather, Geology Lecture room...
...with suitable devices the distribution of current. A convergence of flow lines into a good conductor can be readily detected, and even the effects of better conducting material at considerable depth can often be estimated with a fair degree of assurance. Of course, all masses of rock in the earth that are good conductors are not necessarily bodies. Barren graphitic slates rock beds soaked with salt water, or basic dikes might give effects not unlike more valuable bodies and skillful geological observation and interpretation of the evidence in terms of what is reasonable to expect must be made before satisfying...
...most delicate measurements made by the new methods is in the investigation of irregularities in the gravitational field of the earth by means of the torsion balance. Masses of density different from the surrounding rock, tend to deflect the direction of gravity and the change, though almost infinitesimal, from the standpoint of ordinary human experience, is capable of measurement by observing the amount of rotation of a light beam appropriately weighted and suspended on a thin platinum wire. Ore bodies themselves are rarely large enough to cause detectable variations in gravity, but large features such as heavier rock in cores...