d g cuthbertson (3 Ergebnisse)

Zustand: Good. 1938. 2nd Edition, Revised. 128 pages. No dust jacket. Grey paper covered boards. Pages have light tanning and foxing throughout. Previous owner's inscription to front free endpaper. Binding remains firm. Boards have light shelf-wear with corner bumping. Spine is in good condition. Staining to both boards.

Zustand: Fair. 1933. No Edition Remarks. 270 pages. No dust jacket. Green cloth covered boards with gilt lettering. Pages are moderately tanned and foxed throughout, heavier at end-papers, paste-downs and text-block edges. Plates are bright and clear. Ex Libris plate to reverse of frontispiece. Some occasional mild cracking to gutters throughout however binding remains reasonably firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Cloth has minor damp and dust stains. Mild crushing to spine ends. Book has a slight forward lean. Gilt lettering is darkened.

Soft cover. Zustand: Very Good. 8vo (20 x 12,5 cm). 56 pp. Modern wrappers. With 2 folding engraved plates. In very good condition. German edition of Cuthbertson's Description of an improved air-pump, and an account of some experiments made with it (1787). Most 18th-century vacuum pumps were constructed using cocks or valves. A common problem was that after a while they became 'leaky', allowing the exhausted air to return into the barrels. To remedy this Cuthbertson invented a double-barreled pump "without either cocks or valves, and so contrived, that what is employed in their stead, has the advantage of both, without the inconveniences of either", as he stated in the original treatise. In his preface the translator notes that be bought a vacuum pump directly from Guthbertson. The largest model was available for "330 Holländische Gulden", "ein Preiß welcher gegen die Smeatonschen, und Hurter und Haasischen Pumpen, bei ihrer wahren Güte beträchtlich geringer ist". The first plate is a perspective view of the pump, and the second shows the individual parts. John Cuthbertson (1743-1821) was a renowned English inventor and instrument maker, best remembered for building a huge electrostatic generator for Teylers Museum in Haarlem, The Netherlands. Rare on the market.