KEYNES, John Maynard. The General Theory of Employment, Interest and Money. London: Macmillan and Co., 1936. 8o. Original blue cloth gilt; original printed dust jacket. FIRST EDITION of Keynes' attempt to provide an explanation of the vagaries of the trade-cycle and new methods of controlling them. PMM 423 ("his influence... even on his theoretical opponents, has been such that a highly placed American official recently remarked that 'we are all Keynsians today.'") -- Another edition. First American Edition. 8o. Original blue cloth, gilt-lettered on spine (gilt a trifle faded); original printed dust jacket (vertical creases on covers, some short edge tears, jacket flap corners clipped, endpapers slightly discolored). Provenance: Adelaida Nutting (ownership inscription on front free endpaper). -- BABBAGE, Charles. On the Economy of Machinery and Manufactures. London: Charles Knight, 1833. 8o. Engraved title. (Scattered light foxing at beginning and end.) Contemporary cloth (rebacked). Third enlarged edition. (3)