"An act to authorise the governor ... to incorporate a company for erecting a permanent bridge over the River Schuykill" (p. [3]-10) was approved Mar. 16, 1798. The patent issued by Gov. Mifflin incorporating the Schuykill Permanent Bridge Company (p. [17]-21) is dated Apr. 27, 1798.
Microfiche. [New York : Readex Microprint, 1985] 11 x 15 cm. (Early American imprints. First series ; no. 34321).