270 HENRY SOTHERAN & CO., 140, STRAND, W.C, and 37, PICCADILLY, W. 



5306 WEDDLE (Thomas; F.R.s. ; Sandhurst College) New, Simple, and General Method of 

 Solving Numerical Equations of all Orders, 4to. (pp. 36), hf. d., or, hf. -hound, 4s Qd 



published for the author, Tynemouth, 1842 

 This paper was read before the Royal Society, and procured his election as a fellow. 



5307 "WEINHOLD (Adolf Ferdinand) Physikalische Demonstrationen : Anleitung zuni 

 Experimentiren ; with 4 plates, and 483 woodcuts^ roy. 8vo. hf. cl. {nice copy), 3s Qd (p. M. 22) 



Leipzig, 1881 



5308 Introduction to Experimental Physics, Theoretical and Practical, including 



Directions for Constructing Physical Apparatus, and for Making Experiments, trans, and edited 

 by Benjamin Loewy, f.r.a.s., with Preface by George Carey Foster, f.r.s., 3 coloured plates, 

 and 404 woodcuts, thick 8vo. c/., calf, or, hf. morocco {out of print), 5s (p. £1. lis Qd) 1875 



5309 WEISBACH (Julius) Ingenieur : Tafeln, Formeln und Regeln der Arithmetik, Geometric, 

 Mechanik und des Ingenieurwesens, 6. Aufla^e von F. Reuleaux und G. Querfurtii ; with 489 

 woodcuts, 12mo. hf. calf gilt {nice copy), 3s 6a (p. M. 8 sewn) Braunschweig, 1874 



5310 Lehrbucii der Ingenieur- und Masciiinen-Mechanik, mit den nothigen Hiilfslehren 



aus der Analysis, 5. [neueste] verbesserte und vervollstiindigte Auflage bearbeitet von Gustav 

 Hermann, Teil I, Teil II, 1.— 2. Abteilung, Teil III, 2.-3. Abteilung ; with about 4000 wood- 

 cuts, 6 thick vols. 8vo. new hf. brown calf gilt, £5. (p. M. 158.60 unbound) ib., 1875-1901 



Inhalt : — I. Theoretische Mechanik, 75 : II. 1. Statik der Bauwerke, 'S3 : II. 2. Mechanik der Uratriebsniaschinen, '87 : 

 III. 2. Maschinen zur Ortsveriinderung, 'S2 : III. 3. Maschinen zur Fonnveriinderunpr, 2 v. '96-1901. 



5311 Manual of the Mechanics of Engineering, and of the Construction of Machines, with 



Introduction to the Calculus, Vol. I : Theoretical Mechanics, trans, from the 4th German Ed. 

 by ECKLEY B. COXE, ivith 902 woodcuts, thick 8vo. new buckram, 8s 6d (p. £1. 5s) New York, 1872 



5312 Vol. II : Application of Mechanics to Machines. Part II: He:at, Steam, and 



Steam Engines, trans, from the 4th German Ed. by A. Jay Du Bois, with Additions showing 

 American Practice by R. H. Buel, c.e., with 818 woodcuts, large Svo. hf. calf {title stamped), 

 8s 6d (p. £1. Is nett) ibidem, 1878 



5313 Principles of Mechanics and Machinery of Engineering [trans, by J. R.], with 867 



ivoodcuts, 2 vols. Svo. Jtf. morocco, or, hf. calf, 4s 1847-8 



5314 WELD (Charles Richard) History of the Royal Society, with Memoirs of the Presidents, 

 compiled from Authentic Documents, ivith plates, woodcuts, and fss., 2 vols. Svo. cl., 10s 

 (p. £1. 10s) 1848 



* a well-written, and ranch-needed supplement to the histories of Birch and Thomson.'— D. N. B. 



5315 Descriptive Catalogue of the Portraits in the Possession of the Royal Society, Svo. 



setvn {scarce), 5s 1S60 



' An interesting appendix to the ' History ', compiled by order of the conncil.'— Idem. 



5316 WELD (Laenas Gifford, Univ. Iowa) Short Course in the Theory of Determinants, post 

 Svo. cl., 4s (p. 7s (^d) 1893 



5317 WELLING- (Georg v.) Opus Mago-Cabbalisticum et Theosophicum, darinnen der Ursprung, 

 Natur, Eigenschaften und Gebrauch des Salzes, Schwefels und Mercurii, nebst sehr vielen 

 sonderbaren mathematischen, theosophischen, magischen und mystischen Materien, audi die 

 Erzeugung der Metallen und Mineralien, aus dem Grunde der Natur erwiesen wird, mit 

 einem besonderen Anhang etlicher sehr rar und kostbarer chymischer Piecen [sic], 3. Auflage ; 

 with copperplates of cabalistic figures, 4to. hf. smooth red morocco gilt (rare), £ 1 . 5s Frankfurt, 1784 



Unknown to Mr. A. B. Waite. The supplement includes : Di.scurs von dera Stein der Weisen, von D. Reusing ; 

 Anonymi Alchimische Fragen, etc. 



6318 WELLINGTON (Ai'thur Mellen), W. B. D. PENNIMAN, and Charles Whiting 

 BAKER: The Comparative Merits of various Systems of Car Lighting, by Oil Lamps, 

 Compressed Gas, Gasoline Carbureters, and Electric Lighting, ivith 10 folding plates {linen- 

 mounted), and 67 ivoodcuts, 12mo. hf. morocco neat, 4s 6d New York, 1892 



5319 W[ELLSJ (J[ohn] ; Gresham College) SciOGRAPHiA, or the ART of Shadowes, plainly demon- 

 strating, out of the Sphere, how to project both great and small circles, upon any Plane what- 

 soever : with a NEW Conceit of reflecting Sunne beames upon a Diall, contrived on a Plane, 

 which the direct beames never shine upon. Together with the manner of cutting, the live Regular 

 Platonicall bodies ; and two other, the one of 12, the other of 30 Rhombes, NEVER DISCOVERED 

 HERETOFORE ; also the hnding of their Declinations, and Reclinations, and adorning with vaiiety 

 of Dials. All performed by the Doctrine of Triangles ; and for ease, and delight sake by helpe 

 of the late invented and worthily admired Numbers, called by the first Inventor Logarithmes, 

 with very numerous woodcuts and diagrams, thick sm. Svo. old calf, newly rebacked {one I. slightly 

 defective, and 2 bookstamps on title, otherwise a sound copy) ; rare, £1. 10s T. Harper, 1635 



' This tract of Dyalling was written for mine owne private deliylit and exercise . . . My two late worthy friends 

 Master Henry Briprgs and Master Edmund Gunter desired to peruse it ; and finding that the Arithmeticall part was per- 

 formed by Logarithmes of both kinds, and therefore might serve instead of uses for the Chiliads and Canon, compiled by 

 them ; did earnestly sollicite m^e to print the same.' — Preface. 



6320 WELLS (Samuel, Register) History of the Drainage of the Great Level of the Fens, 

 called Bedford Level, with the Constitution and Laws of Bedford Level Corporation, 

 2 thick vols. roy. Svo. boards, uncut. Vis (p. £3. 3s) for the author, 1830 



' a full account, historical, legal, practical, and statistical. , . , The account is as minute as Dugdale's . . . and no 

 doubt possesses great local interest.'— (^^Karf. lUv. Vol. II consists exclusively of reprints of historical documents. 



It is dedicated to the then Duke of Bedford as Governor, ' in the fondly-cherished hope that the House of Russell will 

 continue to evince the inextinguishable zeal for the rights and interests of the fens which have so pr e-cminently marked its 

 illustrious predecessors '. All the dwellers on the Level are now (April, 1909) aghast at the approaching sale— even though 

 at low prices directly to themselves— of the great Thorney estate. 



5321 WELLS (Sidney Herbert) Practical Mechanics, 2nd Ed., with 75 illustrations, post Svo. 

 cl.,2s 1902 



