Talk:Robert Grant (astronomer)

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To do list: wikify Ertel transit-circle. I'm still not sure what this is, or how much work it is to wikify it. Unscintillating (talk) 19:13, 9 October 2011 (UTC)[reply]

Transit circle is the same as Meridian circle. This site shows that Ertel (Traugott Lebrecht Ertel [Fribourg 1778 - Munich 1858]) built mathematical instruments at the Mathematical-Mechanical Institute of Munich. Unscintillating (talk) 17:08, 10 October 2011 (UTC)[reply]