Talk:Meridian circle

Scant mention of George Airy??
Surely it is relevant to include at least some mention of the British Astronomer Royal Sir George Biddell Airy (1801-1892), who in 1850 built the transit circle telescope at Greenwich. The location of that telescope was subsequently chosen to define the location of Earth's prime meridian. Samatva (talk) 15:24, 8 September 2010 (UTC)

1911 Britannica mess
The OCR from 1911 Britannica is a hopeless mess. Unless somebody has a print version to correct it from, it could just as well be thrown out. Gene Nygaard 20:49, 6 April 2006 (UTC)
 * I cleaned it up. I think the text is now mostly correct. I removed the footnotes that had gotten mixed up in the article. If someone thinks they're important, they could be readded, but I don't think they are necessary. The article still needs updating, though. In particular, the description may be very different from what is used today, if the instrument is used at all. -- Kjkolb 23:06, 12 April 2006 (UTC)

It might also be nice to have an easier to read english. Also more section titles could be added. There is only the title "Structure" but later detailed measuring procedures for eliminating various errors are described. 85.2.139.221 (talk) 04:49, 3 January 2008 (UTC)


 * The section lifted from the Encyc. Britannica is very out of date. No one looks through a transit telescope anymore - its all CCD. Even since the early 1900's, an "impersonal micrometer" was used, which followed the star in right ascension by means of a drive mechanism, so the observer merely had to finely tweak the crosshairs in two directions, rather than time the passage of the star across some crosshairs (always several of them, in order to average out errors). Tfr000 (talk) 18:08, 31 May 2012 (UTC)


 * Well, I did a lot of modernizing of language, updating of descriptions, elimination of "current" information which went obsolete 100 years ago... added some graphics, added some references... improved the flow and the organization... etc. etc. Not quite finished, but its looking pretty decent now. Tfr000 (talk) 20:53, 7 June 2012 (UTC)

Merge with "Transit telescope"
I think meridian circle and transit telescope are one and the same instrument, so the two pages should be merged. Rlupsa (talk) 16:09, 2 December 2008 (UTC)

I think the meridian circle is a form of transit telescope and if the pages are joined the differences should be noted. Transits do not always face perfectly north or south. 18 dec. 2008 —Preceding unsigned comment added by 68.40.68.145 (talk) 21:44, 18 January 2009 (UTC)

Friction Rollers
These are mentioned in the text. I put a link to friction roller, but the page doesn't exist. I think such a page possibly should: | friction roller search. HonestIntelligence (talk) 09:19, 6 June 2012 (UTC)

more citations?
This article was originally pulled from an old encyclopedia article and dropped here. It has since been expanded and referenced - it now has 17 citations. Do we really need more? Tfr000 (talk) 15:12, 16 May 2015 (UTC)

External links modified
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External links modified (January 2018)
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I have just modified one external link on Meridian circle. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
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