Issued with: Gibson, Robert. A treatise of practical surveying ... The sixth edition. Philadelphia : J. Crukshank, 1792 [i.e., 1794] (Evans 24357).
Signatures: pi² [A]² B-Z² (Z2 verso blank); chi1 *A-*G⁴ *H².
"Tables of difference of latitude and departure .. "--[1], 90, [1] p., with separate title page, dated 1790. Attributed to John Robertson.
Microfiche. [New York : Readex Microprint, 1985] 11 x 15 cm. (Early American imprints. First series ; no. 24357).