Context

Context of 1686. The Boston ephemeris : An almanack of coelestial motions of the sun & planets with some of the principal aspects for the year of the Christian era MDCLXXXVI. Being in our account the third after leap-year, and from the creation 5635 ... calculated for and fitted to the meridian of Boston in New-England, where the North Pole is elevated 42. gr. 21 m.
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