The New Larned History for Ready Reference Reading and Research, Vol. 6 of 12: The Actual Words of the World's Best Historians Biographers and ... All Countries and Subjects and Representing - Softcover

Josephus Nelson Larned

Softcover

ISBN 10: 0243092563 ISBN 13: 9780243092567

Publisher: Forgotten Books, 2018

Synopsis

Excerpt from The New Larned History for Ready Reference Reading and Research, Vol. 6 of 12: The Actual Words of the World's Best Historians Biographers and Specialists; A Complete System of History for All Uses, Extending to All Countries and Subjects and Representing the Better and Newer Literature of History; Inve to Lyki

Introduction. - Man is sometimes distinguished as a tool-using animal. [his] superiority as a tool-user ultimately secured his position over the beasts of the World and enabled him to construct our material civilization. His first tool might have been a stone. A peaceful use of stones as agricultural tools may or may not have preceded their use as weapons. Later some man may have broken a stone by throwing it against a rock, hoping to find among the pieces one suited to his needs [for digging, In some such way there developed the idea of using tools and of forming them. Of course, it is only a small step from breaking the stone as just described and chipping off edges of the selected stone so as to form it more nearly to the de sired shape. But this step may not have been taken for centuries. Between the discovery of the method Of conserving fire and its production by a simple machine many thousands of years must have intervened. A primitive method is that of rubbing a sharp stick back and forth in a groove cut in a block of wood. This simple device is not, however, a machine. It is merely a special tool for rubbing and a block to be rubbed. When primitive man arranged a combination where the rubbing tool was actuated by another part of the device, which part in turn was controlled by the operator, then he had a machine. [this] is of course a development of an earlier form where a pointed stick or drill is twisted by the operator's hands. From this primitive design we can obtain a concept of a machine as a device in which a motion communicated to one part results in a different motion of a second part. J. Mills, Realities of modern science, pp. 1, 4-8.

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Edition details

• Publisher: Forgotten Books
• Publication date: 2018
• ISBN 10: 0243092563
• ISBN 13: 9780243092567
• Binding: Paperback
• Language: English
• Number of pages: 960