Information exchange between Hall and Lardner, and the subsequent account of Hall's innovations in Lardner's Steam engines, 5th ed., published in 1835.
Also filmed as item no. 29852. Printers vary: item no. 29851 printed by R. Allen ; no. 29852, by J. and J. Mawdsley. Microfilm. New Haven, Conn. : Research Publications, [1980]. 1 microfilm reel ; 35 mm. (Goldsmiths'-Kress library of economic literature ; no. 29851)