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"The origin of the earth," geology schoolwork by Eve Drewelowe, March 1, 1922
Page 9
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-9- and Periodic Orbits in 1913. As Salisbury took all the duties and responsibilities from Dr Chamberlin's shoulders, so did Dr Moulton like the mathamatical end and worked out all the mathamatics of the hypothesis. In this way he has contributed to the planetesimal hypothesis and helped present it. These men began their work on the origin of the earth starting out with the nebular hypothesis. Because of its many objections the hypothesis failed. Dr Chamberlin worked for almost ten years on it and tried to make it meet the criticisms against it. It wouldn't work so Chamberlin turned to the meteoritic hypothesis but it was impossible. The only thing to do was to work out a new hypothesis which would meet all the criticism of the nebular hypothesis. The planetesimal hypothesis began with a spiral nebula. Since the time when the nebular hypothesis was advanced many more nebula. Since the time when the nebular hypothesis was advanced many more nebula have become known and the predominant one is the spiral nebula. Such a nebula consists of a luminous, nucleus center, spherical in shape, from which two sets of arms or streamers project on opposite sides and project spirally outward. At various intervals the arms are knotted with condensations. The nebula is not equally distributed and does not conform to the laws of gases, neither is its center compact. There seems to be hazy or realtered material between motion about its center but this form may also be due to gravity and motion at the time of disruption of the body which originated the nebula. The spiral nebula are composed of tiny solid or liquid particles with some gases present, and they seem to revolve about the center of gravity of the nebula, and because they thus act like small planets they are called
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-9- and Periodic Orbits in 1913. As Salisbury took all the duties and responsibilities from Dr Chamberlin's shoulders, so did Dr Moulton like the mathamatical end and worked out all the mathamatics of the hypothesis. In this way he has contributed to the planetesimal hypothesis and helped present it. These men began their work on the origin of the earth starting out with the nebular hypothesis. Because of its many objections the hypothesis failed. Dr Chamberlin worked for almost ten years on it and tried to make it meet the criticisms against it. It wouldn't work so Chamberlin turned to the meteoritic hypothesis but it was impossible. The only thing to do was to work out a new hypothesis which would meet all the criticism of the nebular hypothesis. The planetesimal hypothesis began with a spiral nebula. Since the time when the nebular hypothesis was advanced many more nebula. Since the time when the nebular hypothesis was advanced many more nebula have become known and the predominant one is the spiral nebula. Such a nebula consists of a luminous, nucleus center, spherical in shape, from which two sets of arms or streamers project on opposite sides and project spirally outward. At various intervals the arms are knotted with condensations. The nebula is not equally distributed and does not conform to the laws of gases, neither is its center compact. There seems to be hazy or realtered material between motion about its center but this form may also be due to gravity and motion at the time of disruption of the body which originated the nebula. The spiral nebula are composed of tiny solid or liquid particles with some gases present, and they seem to revolve about the center of gravity of the nebula, and because they thus act like small planets they are called
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