[Download] "An Analysis of the Lever Escapement" by H. R. Playtner # Book PDF Kindle ePub Free
eBook details
- Title: An Analysis of the Lever Escapement
- Author : H. R. Playtner
- Release Date : January 30, 2007
- Genre: Mathematics,Books,Science & Nature,
- Pages : * pages
- Size : 314 KB
Description
The metric system of measurement originated at the time of the French Revolution, in the latter part of the 18th century; its divisions are decimal, just the same as the system of currency we use in this country. A meter is the ten millionth part of an arc of the meridian of Paris, drawn from the equator to the north pole; as compared with the English inch there are 393708/10000 inches in a meter, and there are 25. 4 millimeters in an inch. In any modern work on horology of value, the metric system is used. Skilled horologists use it on account of its convenience. The millimeter is a unit which can be handled on the small parts of a watch, whereas the inch must always be divided on anything smaller than the plates.
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