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Re: Lunar eclipses and other things
From: Wolfgang K�berer
Date: 2004 Oct 28, 09:07 +0200
From: Wolfgang K�berer
Date: 2004 Oct 28, 09:07 +0200
Dear Alex, I always thought that the armillary sphere is a model of the Ptolemaic system; its only use was to demonstrate the celestial spheres and the "workings of the heavens". That seems to be a somewhat different task than that of a star globe. But correct me if I`m wrong. Regarding modern analogue devices you can turn to the 70`s edition of Bowditch which has a chapter on "Comparison of the different methods of Sight Reduction" and also discusses such machines. Willem M?rzer Bruyns, the former curator of the Nederlands Scheepvaart Museum at Amsterdam has published the following article on one of the analogue computers: The Willis Navigating Machine: A Forgotten Invention, in: Rittenhouse, Vol. 14 (2000), No. 51, 13 - 25. Regards, W. K?berer