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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: A superb site for downloading the old
From: Frank Reed CT
Date: 2006 Apr 25, 16:46 EDT
From: Frank Reed CT
Date: 2006 Apr 25, 16:46 EDT
Alex E wrote: "In many places I see an article of Maskelyne on Hadley octant mentioned, as "a supplement to 1774 almanac". Even the later almanacs mention this. I downloaded the whole 1774 almanac and I do not see any supplements in it. Where could they be??" On the site, you will find THREE scans of a Nautical Almanac for 1774. One has 161 pages. The others have 230 and 252 pages. Take a wild guess which one does NOT have the appendix you're looking for. Here are my notes on the appendices from that year: appendix on the elements of the lunar tables. appendix on Hadley's quadrant: adjusting for back-observation, telescope collimation, swinging the arc, shade error, proper sizing of mirrors. appendix by Lyons on positioning a meridianal telescope. appendix by Lyons on using the "general tables of refraction and parallax" (Shepherd's Cambridge Tables) for clearing lunars. A number of the other almanacs appear in several versions. Some of these are actually second editions, labeled that way on the title page. Generally, I picked the one with the greater number of pages. -FER 42.0N 87.7W, or 41.4N 72.1W. www.HistoricalAtlas.com/lunars
