Word: earthing
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...Observatory has issued a circular giving a series of measurements of the diameter of the bright spot surrounding the Linne crater on the moon's surface made before and after the passage of the shadow of the earth during the total lunar eclipse of October 16. The circular contains tables which show that the spot has increased in size during the last three years. Professor W.H. Pickering, who made the observations, believes that the explanation of the change in the size of the spot is that Linne is more active than heretofore, and that there is therefore surrounding it more...
...lecture yesterday afternoon on "The Lesson of the Colorado Canon" Professor W. M. Davis showed by a series of stereopticon views that the great truth revealed by a study of this canon is the vast amount of time during which the earth has been undergoing processes of formation and transformation. Professor Davis first stated that the canon as it exists today has been carved out of solid rock by the erosion of water and the elements. He then proved that not only has this work been going on for ages past but also that incomparably longer there have been...
...increased during the time the moon was obscured. That the spot is a deposit of hoar frost and not light reflected from rock is shown by the fact of its enlargement and increase of light. If the spot were stone virtually no light would have been reflected when the earth's shadow fell upon the moon...
Next month will be especially busy at the Observatory, for during that time the earth passes through the zone of meteors, and attempts will be made to take successful observations with a view to establishing some disputed theories...
...University Observatory is preparing to photograph the total eclipse of the moon which will occur tomorrow night. At 10.17 the moon will enter the umbra of the earth's shadow, and at 12.19 the total eclipse will begin; this will end at 1.48 and at 3.50 the moon will again be clear of the earth's shadow. By photographs the light of the sky will be measured during the eclipse, and the light of the moon eclipsed compared with the moon's light unobscured. The observers will expose also several plates during the eclipse to discover if any hitherto undetected...