Regnier (Edme) Mémoires Explicatifs du Dynamomètre et Autres Machines..., 4 folding engraved plates, some light browning, marginal dampstaining, modern calf-backed marbled boards, spine gilt, uncut, spine rubbed, Paris, [1799] § [Baker (Ezekiel)] [Remarks on Rifle Guns...], eighth edition, lacking title and dedication, 7 engraved plates at end, 5 hand-coloured, also 6pp. engraved table of weight and diameter of lead balls (printed on both sides), spotted and soiled, some marginal tears and defects, contemporary half roan, roan label on upper cover, worn, [1821] § Fleming (George) Roaring in Horses, first edition, chromolithographed frontispiece (lightly spotted), illustrations, original cloth, loose in binding, 1889 § [Axe (J.Wortley)] The Horse: Dissected Model showing the Internal Structure, 2 explanatory leaves, 3 sectionalized chromolithographed plates (one printed on both sides), one with several lift-up flaps of internal organs, slight damage at upper outer corner not affecting text or images, original printed wrappers, a little rubbed and marked, slightly frayed at edges, [1906], 4to & 8vo (4)

⁂ The first is the first separate edition of a treatise on the dynamometer, a device to study muscular force in both men and animals which was used particularly by the artillery to determine horses' pulling power. It also describes and illustrates other inventions of a safety catch to prevent weapons firing accidentally, a weighing machine to help in the making of gun-powder and an electrical machine.