The Nome daily gold digger., 1906-11-26
SHAPED LIKE
 AN EGG

Tt is my firm belief that the earth is composed in the manner of an egg, with three different homo geneous substances. The outer, or the crust of the earth corresponds to the shell of the egg, then there is a softer, perhaps gelatinous sub stance which corresponds to the white of an egg, and in the center of the earth is still another which is like the yolk of an egg.
 These are. the words of Prof. T. w. Edgeworth David, of Sydney University, Australia, one of the worlds great geoogists, who is at the St Francis Prof. David has just returned from attending the national congress of geologists at Mexico City. He has travelled around the world and read papers before the Royal Society in London. While there he came in contact with Prof Milne, one of the great earthquake experts, and was led to believe the new theory as expounded by Milne
 'The proof is easy and simple and the idea is complete departure from former theories of the earth S interior" said Prof. David, his eyes shining with excitement Tt has come to Milne as the result of life long experiments with earthquakes and motion of the earth. The proof is adduced fro mthe lines of the seismograph during an earthquake shock which results in the destruc- tion of buildings, that is, one of ex- tardinary violence. If the lines of the seismograph during such shock are examined it will be found that they are divided into three sets of curves. The shock begins with very slight vibrations, suddenly these are increased to about twice the length without any gradual transition. Af- ter these have continued there comes another equally sharp increase in which the lines become about twice the length of those preceding. It is during the last period of the shock that buildings are wrecked. It is from the study of these lines that Milne has arrived at the theory which has astounded the scientific world.
 Milne was the first man who saw the value of studying earth quakes, and brought scientific treat ment to the subject He noticed at once this silimarity in all impress sions of the seismograph, and thought there must be some reason for the three sets of vibrations. Then he investigated. He found that the slight vibrations continue about 10 degrees from the center of shock. Then the next set begins and con tinues about 120 degrees from the center of shock, then the third set start and are heaviest at that point directly opposite the center of the shock
 If the earth is representedf by a circle drawn on d paper, and point Is marked as the center of shock, then if 10 degrees are marked off along the circumference, it will be found that the distance from this are to its chord is about thirty miles. In other words the crust is thirty miles thick. Then as soon as the vibra- tions get through the crust they strike the white of the egg, and the first quick jnmp comes It is found that the substance under the crust of the earth takes up about four tenths of the diameter on each side, and the inside substance corresponds to the yolk of the egg It is sup posed that the substance immediate ly under the crust of the earth is softer than the crust, and that when the vibrations reach it, the crust rises and falls on 1t in much the same manner of ship on the water. This accounts for the waves in the ground familiar when earthquake shocks are in progress It seems to me beyond a, doubt that the theory is true one and will have a great effect on science, as it will revolu- tionize the theory of wave motion. The whole lecture, in which Milne expressed this great theory, took only about six minutes.
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