NEW METHOD of DIVISION NOUVELLE METHODE ...

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... Dividing Techniques. By. Randall C. Brooks Ph D ... made by John Bird, 1757-8) and the repeating circle (proposed by Tobias. Mayer, 1755), a requirement for ...
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NEW M E T H O D of DIVISION MATHEMATICAL ASTRONOMICAL INSTRUMENTS

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T H E I M P A C T of the D U C de C H A U L N E ' S SCALE DIVIDING T E C H N I Q U E S

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F/£ /£ By the early 19th century, the standard method to lay off the divisions of curricular dividing engines used microscopes like the points of drawing compasses. However, both the mechanicians and scientists sought to improve the method and to understand the errors and their sources. Henry Kater focused on adjusting the position of "dots" to position the screw threads on the limb before they were placed on the circle.

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