Catalogue of the mean declination of 2018 stars between 0h̳ to 2h̳ and 12h̳ to 24h̳ right ascension, and 10⁰ and 70⁰ of north declination, for January 1, 1875.
Prepared under the direction of First Lieutenant Geo. M. Wheeler, in charge of U.S. Geographical surveys west of the 100th meridian, by T. H. Safford.

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