Poor Richard improved: being an almanack and ephemeris ... for the year of our Lord 1751 ... Fitted to the latitude of forty degrees, and a meridian of near five hours west from London; but may, without sensible error, serve all the northern colonies. By

Poor Richard improved: being an almanack and ephemeris ... for the year of our Lord 1751 ... Fitted to the latitude of forty degrees, and a meridian of near five hours west from London; but may, without sensible error, serve all the northern colonies. By (Online)