The Kentucky almanac, for the year of our Lord, 1799: ... Calculated for the latitude of 37$ north, and a meridian of 15$ west of Philadelphia; and will serve, without any sensible variation, for the north western territory, St. Vincennes, state of Tennessee, and the western parts of Virginia.
Chicago Style (17th ed.) CitationThe Kentucky Almanac, for the Year of Our Lord, 1799: ... Calculated for the Latitude of 37$ North, and a Meridian of 15$ West of Philadelphia; and Will Serve, Without Any Sensible Variation, for the North Western Territory, St. Vincennes, State of Tennessee, and the Western Parts of Virginia.
MLA (9th ed.) CitationThe Kentucky Almanac, for the Year of Our Lord, 1799: ... Calculated for the Latitude of 37$ North, and a Meridian of 15$ West of Philadelphia; and Will Serve, Without Any Sensible Variation, for the North Western Territory, St. Vincennes, State of Tennessee, and the Western Parts of Virginia.