Books with title Earth Movements

Excerpt from The Movements of the EarthThe present century is remarkable for the manner in which the unity of Nature, and therefore the unity of Science, which is the study of nature, is being demonstrated to us. We live at a period which, in the coming time, will be looked upon as a very memorable one, because it has taught us that there is as distinct a unity of matter in the universe, as in Newton's time it was clearly demonstrated that there was a unity of force.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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Excerpt from The Movements of the EarthThe present century is remarkable for the manner in which the unity of Nature, and therefore the unity of Science, which is the study of nature, is being demonstrated to us. We live at a period which, in the coming time, will be looked upon as a very memorable one, because it has taught us that there is as distinct a unity of matter in the universe, as in Newton's time it was clearly demonstrated that there was a unity of force.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1891 Excerpt: ... CHAPTER II. SE1SM0METRY. Nature of earthquake vibrations--Many instruments called seismometers only seismoscopes--Eastern seismoscopes, columns, projection seismometers--Vessels filled with liquid--Palmieri's mercury tubes--The ship seismoscope--The cacciatore--Pendulum instruments o£ Kreil, Wagner, Ewing, and Gray--Bracket seismographs--West's parallel motion instrument--Gray's conical pendulums, rolling spheres, and cylinders--Verbeck's ball and plate seismograph--The principle of Perry and Ayrton--Vertical motion instruments--Record receivers--Time-recording apparatus--The Gray and Milne seismograph. Before we discuss the nature of earthquake motion, the determination of which has been the aim of modem seismologieal investigation, the reader will naturally look for an account of the various instruments which have been employed for recording such disturbances. A description of the earthquake machines which have been used even in Japan would form a bulky volume. All that we can do, therefore, is to describe briefly the more prominent features of a few of the more important of these instruments. In order that the relative merits of these may be better understood, we may state generally that modern research has shown a typical earthquake to consist of a series of small tremors succeeded by a shock, or series of shocks, separated by more or less irregular vibrations of the ground. The vibrations are often both irregular in period and in amplitude, and tbey have a duration of from a few seconds to several minutes. We will illustrate the records of actual earthquakes in a future chapter, but in the meantime the idea that an earthquake consists of a single shock must be dismissed from the imagination. To construct an instrument which at the time of an earth...