LEVER, Francis. Francis Lever, the Young Mechanic. London: John Harris, 1835. (132 x 108 mm). (Lacking most of quires A-B, some staining.) Original leather-backed cloth-covered boards (chipped, stained, text-block separating).  RARE. -- SLOANE, Thomas O’Conor. Facts Worth Knowing Selected Mainly from The Scientific American for the Household, Workshop, and Farm. Hartford: S.S. Scranton & Co., 1890. (220 x 136 mm). (Some browning.) Contemporary sheep, morocco lettering-piece gilt (joints starting, rubbed). -- BRANNT, William T. and William H. WAHL (1848-1909), Editors . The Techno-Chemical Receipt Book: Containing Several Thousand Receipts, Covering the Latest, Most Important and Most Useful Discoveries in Chemical Technology, and their Practical Application in the Arts and the Industries. Philadelphia and London: Henry Carey Baird & Co. and Sampson Low, 1896. Printed table laid-in. Original publisher’s decorated red cloth (some minor soiling). Later edition. -- Together, 3 works in 3 volumes, all 8vo, engraved plates, all FIRST EDITIONS except where indicated.