the radii AD and AE as far as they go. Thisis because each is the tenth part of its circle, measured fromits center. Now that portion of the circumference of thecircle BC will be smaller than the same portion DE of thelarger circle, but each will be a tenth part of its ozvn circle,although they are… … clear. An angle never means so many feet, inches ormillimeters; it always means a portion of a circle, measuredfrom the center. ^ v ,ji:^i There is one feature about these angular (of circular)measurements that is of great convenience, which is thatas no definite size is mentioned, but only…
Clocks and watches
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