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by Photo Researchers
$15.00
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Product Details
Our spiral notebooks are 6" x 8" in size and include 120 pages which are lined on both sides. The artwork is printed on the front cover which is made of thick paper stock, and the back cover is medium gray in color. The inside of the back cover includes a pocket for storing extra paper and pens.
Design Details
John Harrison (1693-1776) was a self-educated English clockmaker. He invented the marine chronometer. A marine chronometer is a clock that is precise... more
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John Harrison (1693-1776) was a self-educated English clockmaker. He invented the marine chronometer. A marine chronometer is a clock that is precise and accurate enough to be used as a portable time standard used to determine longitude by means of celestial navigation. When first developed in the eighteenth century it was a major technical achievement, as accurate knowledge of the time over a long sea voyage is necessary for navigation, lacking electronic or communications aids. The first true chronometer was the life work of one man, John Harrison, spanning 31 years of persistent experimentation and test that revolutionized naval (and later aerial) navigation enabling the Age of Discovery and Colonialism to accelerate.
$15.00
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