London: H.D. Symonds; T. Bellamy, 1796. Fourth edition, 8vo., pp.68, quarter leather, gilt, marbled boards, pictorial title; light toning to half title, with two small holes to inner margin, spine neatly repaired with papers, a very good copy.

London: The Louis Cassier Co, 1899. Fifth edition, large 8vo., pp.(vi),162-384, green cloth, gilt, pictorial title, numerous b/w illustrations and figures; foxing and small tear to cloth at head and foot of spine, light rubbing to extremities, a very good copy.

London: G.P. Putnam’s Sons, 1931. Reprinted (third impression of the second edition), 8vo., pp.xv,526, red cloth lettered in black, 500 b/w illustrations and 4 b/w figures; light foxing to endpapers, light marking and slight mottling to cloth, rubbing to extremities, internally clean, a good+ copy. No dust-jacket.

London: Institution of Electrical Engineers, 2001. 8vo.,pp. xvii,235, pictorial hardcover, b/w figures and tables; lightly rubbed to extremities, a very good copy. No dust-jacket.

Cambridge, Mass./London: Yale University Press, 1990. 8vo., pp.xii,273, pale blue cloth, gilt; slight roll to spine, a very good, fresh copy, in very good unclipped dust-jacket, which is lightly sunned to spine.

London: HarperCollins, 1992. First edition, 8vo., pp.378, green cloth, gilt, with 21 colour photographs and over 200 b/w photographs and diagrams; slight soil to top edges, a near fine copy, in a very good complete and unclipped dust-jacket, which is sunned to spine.

London: The British Broadcasting Corporation, 1932. 8vo., pp. 480, hardcover, black lettering, b/w pictorial endpapers, text accompanied by many b/w illustrations; very light toning and foxing to endpapers, otherwise internally clean, boards lightly rubbed, small bruise to head of spine, a very good copy indeed, in a vg colour pictorial dust-jacket, slightly rubbed with light surface soil, creasing to head and tail band and closed tears to head and tail of spine

London: George Bell and Sons. Second, revised edition, published March 1907, 8vo., pp.xv,230,(ii), red cloth, gilt, b/w figures; foxing to fore-edges, toning to endpapers, extremities rubbed, with some rubbing and light scratches to boards, else very good. No dust-jacket.

New York: George H. Doran Company, 1926. First US edition, pocket 8vo., pp.45, turquoise cloth, navy lettering; light toning to endpapers, very light foxing to prelims and edges, not affecting margins, otherwise internally clean, a very good copy in clipped dust-jacket, which s worn to extremities, with closed tears, chipping, and small areas of loss - now in a protective cover.

London: Printed for George Riley, in Curzon Street, Mayfair, 1772. 12mo., pp.xii,192, full calf, five raised bands, red gilt-lettered title label to spine, engraved frontispiece, engraved emblems as headpieces to each chapter; occasional foxing, small closed tear to p.xi, splitting along joints, though stitching remains firm, a little wear to extremities, with some loss to calf at upper section of upper joint, an internally clean and good+ copy.

London: John Harris, 1825. 12mo.,pp. viii,215, red calf spine, gilt lettering, marbled paper covered boards, b/w frontispiece; ownership autograph to front free endpaper, light foxing to endpapers, with toning and occasional light foxing to margins, rubbed to extremities with wear along edges of boards and to corners, spine lightly rubbed and toned, overall very good.

London: Simpkin And Marshall, 1856. Small 8vo.,pp. 59, brown cloth, gilt lettering to front board, monochrome frontispiece; light toning to margins, soiling and scuff mark to front paste down endpaper, rubbed and toned to extremities, webbing becoming slightly visible to inner hinge, otherwise very good. No dust-jacket.

Leiden: E.J. Brill, 1994. 8vo., pp.ix,364, red cloth, gilt; a fine copy, in a very good unclipped dust-jacket.

London: Printed by W. Faden, for the Author, 1768. 4to., pp.(xxv),x,260,86, uncut, just occasionally unopened, rebound with new endpapers, half calf, five raised bands, black title label, gilt-lettered, with gilt decorations to compartments, marbled boards, engraved frontispiece, titles and plates; small ink ownership autograph to title, tissue repairs to corners and edges of frontispiece, closed tears and light wear to margins of first few leaves, with water-staining to fore-margin of p.(vii) and some surface soil to fore-margins of opening leaves, clean within, a very good copy, with handsome modern binding in fine condition.

Cambridge: Deighton, Bell, and Co./London: Bell & Daldy, 1858. First edition, scarce, 12mo., pp.(iii),40, calf-backed marbled boards, gilt; some foxing throughout, a very good, clean copy in fine modern binding.

London: James, John and Paul Knapton. First edition, includes half title, 4to., pp.(x),320, full pannelled calf, five raised bands; lacks title label, wear to calf, including loss of apx. 5x6 cms to front lower LH corner, with professional reinforcement and recolouring to boards, some neat pencilled annotation within, internally very good, a good copy overall.

Paris: Parmantier, Libraire, 1825. Small 8vo., pp.viii,327, rebacked marbled calf boards, red title label and gilt embellishments to spine, engraved frontispiece and four further engraved plates; neat ink ownership inscription, dated 1826, to front free endpaper verso, light foxing within, with slight wear to headband and wear to upper corner of rear board, a very good copy.

London: L. Upcott Gill, 1894. Volumes II and III only (of three), 4to., pp.viii,621,(ii);vii,457,(iii), decorative pictorial bevelled green cloth, gilt, a.e.g., colour frontispieces, colour plates, b/w plates and figures; light foxing, superficial paper splitting to inner hinges, light rubbing to extremities, light dampstaining to boards, a very good (partial) set.

Dordrecht: D. Reidel Publishing Company (Kluwer), 1986. Reprinted, 8vo., pp.xi,268, glazed hardcover; very good indeed. No dust-jacket, as issued.