782 HENRY SOTHERAN & CO., 140, STRAND, W.C, and 43, PICCADILLY, W. 



15532 WHETHAM (William Cecil Dampier, f.r.s. ; eugenist) 'Ionic Velocities ' (Abstract),. 



with 2 illustrations, 8vo. (pp. 8), sewn, \s 1892: 



15533 The Ionization of Dilute Solutions at the Freezing Point, ivith woodcuts and 



charts, 4to. (pp. 40), seum, 2s 1900< 



15534 The Recent Development of Physical Science, with portraits, plates, and ivoodcutsy 



large post 8vo. cl., 3s Qd (p. 7* 6d nett) 1904* 



15535 Solution and Electrolysis, with 19 illustrations and folding table, post 8vo. cl. 



(o. p.), 5s Univ. Press, Cambridge, 1895 



15536 Treatise on the Theory of Solution, including the Phenomena of Electrolysis, 



u-ith 66 illustrations, 8vo. cl., 6s Qd (p. 10s nett) apud eandem, ibidem, 1902" 



15537 < On the Velocities of the Ions ' (Abstract), 8vo. (pp. 6), sewn, \s 1895> 



15538 On the Velocities of the Ions and the Relative lonization-Power of Solvents, 8vo. 



(pp. 5), sewn, \s Qd 1894 



15539 W[HITE] (J[o]iii, Vicar of Cherton']) Rich Cabinet, with Variety of Inventions : unlock'd 

 and open'd, for the Recreation of Ingenious Spirits at their vacant Hours, being Receipts and 

 Conceits of several Natures, and fit for those who are Lovers of Natural and Artificial Conclusions ;. 

 as also Variety of Recreative Fire-works both for Land, Air, and Water, and Fire- works of 

 Service for Sea and Shore, with divers Experiments in Drawing, Painting, Arithmetick, 

 Geometry, Astronomy, and other Parts of the Mathematicks, likewise Directions for Ringing 

 the most usual Peals that belong to that Art; 5th Edition, with many Additions, loith engraved 

 title in compartments by T. Cross, and numerous woodcuts, 12mo. handsomely bound in mottled 

 calf (hole burnt in one leaf and sliqhtlii soiled, but a sound copy) ; RARE, £1. 10s 



W. Whitwood, 1677 



Especially interesting for containing numerous recipes for fireworks. There are also descriptions of some curious dials, 

 a diving bell, ' a Ship that cannot be drowned ', etc. etc ; while Bell-ringing is probably included from the interest which 

 the extraordinarily complex combinations in a ring of eight may have to a mathematician. 



15540 WIDMER (Georg, m.d.) Chymia Corporis Animalis, cum Lithogeognosia et Artificio 

 Aquas Salsas dulcificandi, Methodo scientifica pertractata, 4to. (pp. 40), se^^?w, 4s Argentorati, 1751 



15541 Theoria Chimificationis, Chylificationis, et Lactificationis Methodo scientifica 



pertractata, 4to. (pp. 28), sewn, 5s ibidem, 1753 



15542 WIEG-LEB (Johann Christian) Chemische Versuche liber die alkalischen Salze, neue 

 verbesserte und vermehrte Autlage, 8vo, sewn {rare), 8s Qd Berlin, Friedrich Nicolai, 1781 



An important work, in which the author proved the existence of alkalies in fresh plants, against the opinion then held 

 that they only existed there in the burnt stat<?. 



15543 Handbuch der allgemeinen Chemie, 2, neuberichtigte Auflage, 2 vols. 8vo. hf. calf, 



Is Qd ibidem, apud eundem, 1786 



' He enriched pharmaceutical and technical chemistry by valuable observations.'— Pro/. E. v. Meyer. 

 The publisher of both works was Friedrich Nicolai, polygrapli and friend of Lessing. 



15544 WILCKE (Johan Carl) Tal om Magneten ; with vignette on title, 12mo. (pp. 44), sewn 

 (rare), 8s Qd Stockholm, 1764 



A short historical account of magnetism, copiously quoting the original authorities. There was no copy of it in the 

 Ronalds Library. 



15545 WILDA (Hermann, Technikum Bremen) Der Schiffsmaschinenbau t Grundlagen der 

 Tkeorie, Berechnung und Konstruktion, auf Grund des Werkes * Machines Marines ' von L. E. 

 Bertin bearbeitet ; with folding plate, and 4Q2 illustrations, roy. 8vo. cL, 13s (p. M. 26) 



Hannover, 1901 



15546 WILKENS (Marten) Aritmetica ofte Reken-Konst, verciert met veel schoone Regulen ende 

 Exempelen ; laetste Druck veel verbetert en vermeerdert ; with fine portrait, 12mo. old hf. calf. 

 Is Qd Gr&ningen, 17 1& 



Unknown to Professor de Morgan, who does not mention the author in his ' List of 1580 Names of Authors of Works on 

 Arithmetic' 



15547 WILLOOCKS (Sir William; Roorkee Coll.: M-lc.e,, designer of the Aswan Dam) Egyptian 

 Irrigation, with Introduction by Lt.-Col. J. C. Ross, r,e., 'IQ folding plates and plans, and 69 

 other illustrations, thick roy. 8vo. cl., 9s (p. £1. 16s) 1889 



15548 The IRRIGATION of MESOPOTAMIA, roy. 8vo. cl., with Atlas, containing iQ plates, folio, 



portfolio— 2 v^ls., 12s Qd (p. £1 nett) 1911 



15549 The Restoration of the Ancient Irrigation Works on the Tigris, or tlie Re-Creation 



of Chaldea, with Appendixes (Meteorological Information about Bagdad, etc.), with 10 folding 

 plates and plans, roy. 8vo. sewn, 4s Cairo, 1903 



Perhaps now that superhate has ruined 'German prospects in Mesopotamia, General Chesney's ghost may yet see the 

 Euphrates Valley Railway carried out by the country which first surveyed it. 



15550 WILLIAMS (Jolin) The Climate of Great Britain ; or Remarks on the Change it has 

 undergone, particularly within the last 50 Years, accounting for the increasing Humidity and 

 consequent Cloudiness and Coldness of our Springs and Summers . . . including various 

 Experiments to ascertain the Causes of such Change, 8vo. old hf. calf, Qs Qd 1806 



The author would have ' improved ' our greatest national asset and the goodGraf Zeppelin's hete noire by charging the 

 air with electricity by means of electrical machines. 



15551 WILLIAMS {3 ohn, mineral surveyor) The Natural History of the Mineral Kingdom, 

 relative to the Strata of Coal, Mineral Veins, and the prevailing Strata of the Globe, 2nd Edition, 

 with Appendix, containing a more extended View of Mineralogy and Geology, by James Millar, 

 M.D., with 2 copperplates, 2 vols. 8vo. old calf {rare), 10s Edin., 1810 



' A work of great merit for that day, and of practical utility, as containing the best account of the coal strata.'— Si?- 

 Clmrles LycU. The work contains an attack on the Huttonian System, which, the author fears, will ' lead to downright 

 infidelity and atheism '. 



