London: Frederick Muller, 1968. First edition, 8vo., pp.vii,182, grey hardcover, gilt; foxing to edges, a very good copy, in a price-clipped dust-jacket, which shows light surface soil, and a little rubbing to the extremities, but is otherwise very good.

Cambridge: Cambridge University Press, 1948. 8vo., pp.vii,652, hardcover, silver lettering, b/w diagrams and illustrations; ownership autograph to front free endpaper, lightly toned, else internally clean, rubbed to extremities, else a very good copy in a good+ unclipped dust-jacket, with a few light marks, some rubbing and wear to spine, small area of loss to headband and chipping to tailband.

London: Routledge and Kegan Paul, 1959. First edition, small 8vo., pp.ix,232, black cloth, gilt, 7 b/w plates and 3 in-text figures; a very good copy, in a price-clipped dust-jacket, which is chipped to the head of tail of spine, with minimal loss, and has 3cm closed tear to head of fold over upper joint, small closed tear to rear upper margin, and some toning to the pale paper.

Oxford: Oxford University Press, 2015. 8vo.,pp. xvii,531, hardcover, silver lettering, b/w figures; a near-fine copy, in a near-fine unclipped pictorial dust-jacket.

Bristol: Adam Hilger, 1991. 8vo., pp. 184, black hardcover, gilt, b/w figures and illustrations; a very good indeed copy in a vg unclipped dust-jacket with some light surface scratches.

London: Martin Lawrence Limited, 1928. First edition, 8vo., pp.414, blue cloth, gilt, b/w frontispiece portrait with tissue guard; light foxing to prelims, light rubbing to extremities, a very good copy, in an edgeworn unclipped dust-jacket, which has 1cm loss at headband, chipping and closed tears to the edges, and staining/marking to the paper. Now in a protective cover.

London: Victor Gollancz, 1951. First edition, 8vo., pp.254, terracotta cloth lettered in black; foxing to endpapers, toning to edges, light rubbing and slight sunning to edges of boards, else a very good copy, in an unclipped dust-jacket, which is toned to the spine and margins, with water staining to fore-margins, closed tears and light chipping to upper edge. Now in a protective cover.

London: Routledge and Kegan Paul, 1961. First edition, 8vo., pp.xii,463, navy cloth, copper gilt, colour frontispiece and plates; toning to edges, light tobacco odour, a very good copy, in a good price-clipped dust-jacket, which is partially toned, with light chipping and small closed tears to extremities.

Tuusula: The Finnish Academy of Science and Letters, 1998. 8vo., pp.470, paperback; ownership bookplate to front wrapper verso, light shelfwear to wrappers, a very good copy.

New York: University of Columbia Press, 1973. 8vo., pp.ix,180, turquoise cloth, gilt; very minimal pen marking to rear paste-down endpaper, boards lightly toned, slight rubbing to extremities, a very good copy, in chipped glassine wrapper.

Norwood: ARTECH HOUSE, INC, 2006. 8vo., pp.xiv,210, pictorial hardcover, b/w diagrams; just slight shelfwear, a very good copy indeed. No dust-jacket, as issued.

London: Routledge and Kegan Paul, 1985. First edition, 8vo., pp.xiv, red hardcover, gentle vertical crease to spine, light creasing to head/tailbands, else a very good copy, in a lightly toned unclipped dust-jacket.

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: 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: 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.

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.

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

London: Virtue and Co, 1867. Pocket 8vo., pp.viii,204,10 (publisher’s adverts), red cloth wrappers with unlettered spine and front cover stamped in gilt and blind; crosses marked to margins, corners have been folded, marking to wrappers, with light wear to edges, darkening to cloth, a good copy.