HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 37, PICCADILLY, W. 285 



5196 WALTON ( J.) The CATECHISM of the AUTHOR of the MINUTE PHILOSOPHER fully ANSWER'D, 

 with diagrams, sm. 8vo. (pp. 30), sewn (rare), 4s 1735 



5197 - A VINDICATION of SIR ISAAC NEWTON'S Principles of FLUXIONS, against the Objections 

 contained in the ANALYST, sm. 8vo. (pp. 32), sewn (rare), 6s 1735 



The above were perhaps the best answers to Bp. Berkeley's attack on the principles of Newton's fluxional calculus 

 (v. Nos. 3-17-8, ante). They were unknown to Watt, Allibone, Poggendorff, etc., but are fully discussed by Prof. Moritz 

 Cantor. 



5198 WALTON (William, Trinity Coll., Cantab.) COLLECTION of PROBLEMS in Illustration of the 

 Principles of ELEMENTARY MECHANICS, ivith 5 folding plates, 8vo. cl. (used copy), 3s 



Cambridge, 1858 



5199 _ COLLECTION of PROBLEMS in Illustration of the Principles of THEORETICAL HYDROSTATICS 

 and HYDRODYNAMICS, 3 fold ing plates, Svo. cl., 3s ibidem, 1847 



5200 - COLLECTION of PROBLEMS in Illustration of the Principles of THEORETICAL MECHANICS, 

 9 folding plates, 8vo. cl., 3s ib., 1842 



5201 - ANOTHER COPY, hf. calf gilt, 3s Gd 



5202 SECOND EDITION [enlarged], with 1 folding plates, 8vo. cl., 4s Gd ib., 1855 



THIRD [LAST] EDITION [with numerous additional Problems], 7 folding plates, thick 8vo. 



5203 



cl., 8s (p. 16s) ib., 1876 



5204 PROBLEMS in Illustration of the Principles of PLANE CO-ORDINATE GEOMETRY, 



diagrams, 8vo. cl., 4s Gd ib., 1851 



5205 - TREATISE on the DIFFERENTIAL CAifflTTxr&rdiagrams, 8vo. cl., 3s ib., 1845, or '6 



5206 ANOTHER COPY, cl., ivith auto. [Sir] 'J* Knox^Laughton, Caius Coll: 1852 ' on flyleaf, 



3s Gd ib., 1846 



5207 - ANOTHER COPY, with COLLECTION of PROBLEMS in Illustration of the Principles of 



THEORETICAL HYDROSTATICS and HYDRODYNAMICS, 3 plates 2 vols. Svo. in 1, hf. calf gilt, 

 6s ib., 1845-7 



5208 WANSBROTTGH (William Dyson) The PORTABLE ENGINE : its Construction and Manage- 

 ment, with 2 folding plates (linen-mounted), and 90 woodcuts, post Svo. hf. green calf, 2s Gd 1887 



5209 WARBURTON (Henry, F.R.S. ; M.P.) On the PARTITION of NUMBERS, and on COMBINATIONS 

 and PERMUTATIONS (pp. 22) : On SELF-REPEATING SERIES (pp. 16) 2 vols. 4to. in 1, hf. calf, with 

 Sandhurst College bookplate, 4s Gd Cambridge, 1847-54 



The author's only two mathematical works. He was one of the founders of London University, and an original member 

 of the Political Economy Club. 



5210 WARD (George, Philomath.) The GAUGER'S PRACTICE : or the Practical Way how to Gauge 

 and Inch Brewers Tuns ; and the Gauging of Casks, according to the True Rules of Art, with a 

 Table of Cylinders in Ale Gallons and Centessemal [sic] parts, from 8 to 60 Inches in Diamiter 

 [sic], and 31 Inches in Depth, Svo. sound copy in contemporary sheep, 7s Gd 1693 



Unknown to Lowndes, Allibone, and Watt. 



5211 WARD (John; Ganger- General of Excise) CLAVIS USUILE ; or a KEY to INTEREST, both 

 SIMPLE and COMPOUND, with Rules to be observ'd in Estimating the Value of Annuities, or 

 Leases, and Insurances for Lives, with folding portrait by v. d. Gucht (fine impression), 12mo. 

 sound copy in old calf (rare), 12s Gd 1710 



Unknown to Lowndes and Prof, de Morgan. 



5212 The YOUNG MATHEMATICIAN'S GUIDE : a Plain and Easie Introduction to the Mathe- 



maticks, with Appendix of PRACTICAL GAUGING, 3rd Ed., portrait by van der Gucht, and diagrams, 

 sm. Svo. old calf, 6s 1719 



5213 - - SIXTH EDITION, carefully corrected, and New Tables of Compound Interest at 5 p.c., 

 portrait and diagrams, Svo. old calf, 5s 1734 



5214 - SEVENTH EDITION, with the HISTORY of LOGARITHMS, and Index, diagrams, Svo. old 

 calf, 5s 1740 



5215 - ELEVENTH EDITION, with Supplement, containing the HISTORY of LOGARITHMS, dia- 

 grams, Svo. old calf, 5s 1762 



' A useful course, which is recommended by Raphson and Ditton.' Prof, de Morgan. 



5216 WARD (Seth, 50th Bp. of Sarum; Savilian Prof.; F.R.S.) IDEA TRIGONOMETRIC DEMON- 

 STRATA (in usum Juventutis Oxon.) ; item Pnelectio de COMETIS, et Inquisitio in BULLIALDI 

 ASTRONOMIC PHILOLAIC^: FUNDAMENTA ; with diagrams, 3 vols. cr. 4to. in 1, old calf (sound 

 copy), with bookplate of Philip 2nd Earl Stanhope, F.R.S., 15s Oxonice, 1654-3 



In the last treatise, the author advances 'a theory of planetary motion at once simpler and more accurate than that of 

 Boulliau. . . . According to his hypothesis the line drawn from a planet to the superior iocus of its elliptical orbit turns 

 with a uniform angular velocity round that point'. D. N. B. 



5217 WARDLE (Sir Thomas, F.C.S.) EXAMINATION into the DIVISIBILITY of the BRIN or ULTIMATE 

 FIBRE of the SILK of Bombyx Mori, or Silk of Commerce, and of some Wild Silks, with a MONO- 

 GRAPH 'sullo Sfilacciarsi delle Sete Tinto ', trans, by KATE MILNER and the AUTHOR, with 

 numerous illustrations, Svo. cl., 4s Manchester, 1908 



5218 WARDLE (W.) COMPREHENSIVE REFERENCE BOOK on PRACTICAL COAL MINING, 3rd Ed., 

 with portrait, and numerous plates and woodcuts, Svo. cl., 3s 1889 



5219 FOURTH EDITION [enlarged], with portrait, and numerous plates and ivoodcuts, Svo. cl., 



5s 1891 



5220 WARNER (Thomas) How to KEEP the CLOCK RIGHT by OBSERVATIONS of the FIXED STARS 

 with a Small Telescope, with Tables of Stars, roy. Svo. cl. (scarce), 5s 1869 



5221 WARR (George Finden) DYNAMICS, CONSTRUCTION of MACHINERY, EQUILIBRIUM of 

 STRUCTURES, and the STRENGTH of MATERIALS, with 277 woodcuts, Svo. c/., 2s Gd 1851 



5222 ANOTHER COPY, hf. calf gilt, 3s 



18 



