Downes, J., & Hunt, F. (1844). The United States' almanac; or complete ephemeris, for the year 1844: Containing the length and increase of days, and the sun's rising and setting, &c., given for six different parallels of latitude, embracing the whole extent of the Union;. Philadelphia: published by E. H. Butler.

Downes, John, and Freeman Hunt. The United States' Almanac; or Complete Ephemeris, for the Year 1844: Containing the Length and Increase of Days, and the Sun's Rising and Setting, &c., Given for Six Different Parallels of Latitude, Embracing the Whole Extent of the Union;. Philadelphia: published by E. H. Butler, 1844.

Downes, John, and Freeman Hunt. The United States' Almanac; or Complete Ephemeris, for the Year 1844: Containing the Length and Increase of Days, and the Sun's Rising and Setting, &c., Given for Six Different Parallels of Latitude, Embracing the Whole Extent of the Union;. Philadelphia: published by E. H. Butler, 1844.