An Almanack of the coelestial motions, aspects, eclipses, &c. for the year of the Christian aera--1720 : ... Calculated for the meridian of Harvard College in Cambridge, N.E. lat 42 deg. 25 min. n. & 4 h. 44m. west from His Majesty's Royal Observatory at Greenwich, as corrected by the latest and most accurate observations. Being the bissextile, or leap-year.