Caption title.
Issued as the third part of: Adams, George. Astronomical & geographical essays ... 4th ed. Whitehall, Pa., 1800 (Evans 36756).
Publisher's name from title pages to parts I and II.
"Essay IV. An introduction to practical astronomy."--p. 57-148.
Microfiche. [New York : Readex Microprint, 1985] 11 x 15 cm. (Early American imprints. First series ; no. 36756).