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Re: Impossible lunar example. was: Short-cut lunars. was: Clearing lunars
From: Paul Hirose
Date: 2010 Aug 28, 15:34 -0700
From: Paul Hirose
Date: 2010 Aug 28, 15:34 -0700
Some time ago I pointed out the archive.org site as a source of documents, some of which are not available on Google. In this case, the 1781 Tables Requisite *is* on Google, but doesn't appear in a search! What I did was find it on archive.org: http://www.archive.org/details/tablesrequisite00longgoog Then I clicked the "PDF (Google.com)" link on the left. That leads to the book on Google. Or, you could download the whole book directly from archive.org. Click the little link marked "HTTP" on the left. That takes you to a page where the various file formats (PDF, etc.) are listed. The "Read Online" link has always been troublesome for me. It won't work at all with IE 8 -- the browser just sits there doing nothing. With Firefox it's really slow compared to the online reader at Google, and an incredible memory hog. After a few minutes on a low speed connection, my system's page file usage reached 670 MB. That's more than 3x the biggest number I've ever seen when not using the reader. Hint -- on archive.org, if you have a choice between a file digitized by Google, and one *not* digitized by Google, choose the latter. Several times I've seen the same publication digitized by more than one organization, and have always found the non-Google scan clearly superior. A maddening number of Google scans are sloppily done -- blurry, mis-framed, etc. Another archive.org hint -- don't assume the year on the Web page is correct. Several times I've found these inaccurate. The only way to be sure is to look at the scan. Regarding astronomical time vs. civil time vs. nautical time, the memory trick I use is to imagine three watches, correctly set to those time scales, side by side at civil noon. If you arrange them in alphabetical order, they're also in chronological order: Aug 28 00h astronomical = Aug 28 12h civil = Aug 28 24h nautical --