4 books
Spons' encyclopaedia of the industrial arts, manufactures, and commercial products (Division III)
Spon's Engineers and Contractor's Illustrated Book of Prices of Machines, Tools, Ironwork, and Contractors' Material, for 1876
Spons' Encyclopaedia of the Industrial Arts, Manufactures, and Commercial Products
Spons' Dictionary of Engineering, Civil, Mechanical, Military, and Naval, Volume 4