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Authority (1626 words) |
 | Kentucky River Authority The Kentucky River Authority is an agency of the Commonwealth of 1986. |
| Monetary Authority of Macau The Monetary Authority of Macau (澳門金融管理局; A... |
| Orlando Orange County Expressway Authority The Orlando Orange County Expressway Authority or OOCEA is the Central Florid... |
| PTOLEMY (CLAUDIUS PTOLEMAEUS) - Online Information article about PTOLEMY (CLAUDIUS PTOLEMAEUS) (9570 words) |
| Ptolemy concludes his great work by saying that he has included in it everything of practical utility which in his judgment should find a place in a treatise on astronomy at the time it was written, with relation as well to discoveries as to methods. |
| De Morgan doubts whether this work is genuine on account of the absence of allusion to the Almagest or to the subject of refraction in the Almagest itself; but his chief reason for doubting its authenticity is that the author of the Optics was a poor geometer. |
| Ptolemy especially devoted himself to the mathematical branch of his subject, and the arrangement of his work, in which his results are presented in a tabular form, instead of being at once embodied in a map, was undoubtedly designed to enable the student to construct his maps for himself. |
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