HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 37, PICCADILLY, W. 263 



5159 WALKER (Richard, Apothecary to the Eaddiffe Infirmary] EXPERIMENTS on the PRODUCTION 

 of ARTIFICIAL COLD (pp. 8) : OBSERVATIONS on the best METHODS of PRODUCING ARTIFICIAL 

 COLD, plate of apparatus (pp. 20) 2 parts 4to. sewn, 3s Qd 1788-95 



5160 WALKER (Robert, Wadham Coll.) The ELEMENTS of the THEORY of MECHANICS, 8vo. hf.cl., 

 3s Oxford, 1830 



5161 WALKER (Sydney P., M.I.M.E.) ELECTRIC LIGHTING for MARINE ENGINEERS, 2nd Ed., with 

 108 woodcuts, post 8vo. cl., 2s (p. 5s) [1896] 



5162 ELECTRICITY in MINING, with 32 plates, and 163 other illustrations, 8vo. cL, 6s (p. 9s 



nett) 1907 



5163 STEAM BOILERS, ENGINES, and TURBINES, with 28 plates, and 189 other illustrations, 8vo. 



cl., Qs (sells 9s nett) 1908 



5164 WALKER (Thomas Andrew; contractor) The SEVERN TUNNEL: its CONSTRUCTION and 

 DIFFICULTIES, 1872-87, with 5 fine steel portraits of Sir John Hawkshaw, the Author, and others, 

 and over 40 lithographs and plans (mostly folding), roy. 8vo. cl., Ss (p. 1. 5s) 1888 



The history of the most romantic and exciting work in all English engineering, written by the man who carried it 

 through. It includes generous recognition of all the chief agents employed, and not least of Lambert the diver, who 

 crawled a thousand feet in the dark to shut the iron door at the end of the heading, when it was completely drowned out. 



5165 WALKER (William, Jr.) MEMOIRS of the DISTINGUISHED MEN of SCIENCE of GT. BRITAIN, 

 living in 1807-8, with Intro, by ROBERT HUNT, F.R.S., with folding front., containing 51 portraits, 

 by WILLIAM WALKER, Svo, cl., 6s Qd 1862 



The fifty-one here commemorated were a truly remarkable illustration of the age they lived in. 



5166 WALKINGAME (Francis, writ ing -master) The |ifto TUTOR'S ASSISTANT, being a Com- 

 pendium of Arithmetic and a complete Question-Book. The KULES are VERSIFIED ; a Plan 

 entirely New, arid much better adapted to Young Minds than that of Prose, 12mo. old calf (very 

 sound copy) ; VERY RARE, 1. Is 1781 



This is the 18th edition of the ' Tutor's Assistant ', from which it differs in having the rules versified. This ' poetical 

 edition ' appears to have had no success, and was unknown alike to Prof, de Morgan and D. N. B., while the prose version 

 went through numberless editions. 



' By far the most used of all the school-books, and deserving to stand high among them.' Prof, de Morgan. 



5167 WALL (A. H.) ARTISTIC LANDSCAPE PHOTOGRAPHY, with 5 plates, and numerous woodcuts, 

 Svo. hf. buckram, Is Qd (p. 3s Qd) Bradford, [1896] 



5168 WALLACE (Alfred Russel, F.R.S.) MAN'S PLACE in the UNIVERSE : a Study of the Results 

 of Scientific Research in Relation to the UNITY or PLURALITY of WORLDS ; 4th Ed., with Addi- 

 tional Argument dependent on the Theory of Evolution, diagrams and map, thick Svo. cl., 3s Qd 

 (p. 6s) 1904 



Dr. Wallace's remarkable argument against the plurality of worlds. 



5169 WALLACE (Robert, Prof. Mathematics, Glasgow) ELEMENTS of ALGEBRA: a short and 

 practical Introduction on a New Plan, with Simplification of the Rule for the Solution of Equations 

 of all Dimensions, Svo. sewn, 3s 1828 



5170 WALLACE (William) ALSTON MOOR: its Pastoral People, its MINES and MINERS, with 

 plates, Svo. cl., with auto, letter from the author, 3s Qd Newcastle-on-Tyne, 1890 



An interesting account of the wild leadinining country in the high moors of West Tynehead, which has been worked 

 since Roman times. 



5171 WALLACE (William Clay, M.D., N. Y. Inst.for the Blind) The ACCOMMODATION of the EYE 

 to DISTANCES, with woodcuts, Svo. (pp. 36), sewn, with auto, of Peter Mark Roget, F.R.S. , 3s 



New York, 1850 



5172 - - The STRUCTURE of the EYE, with reference to NATURAL THEOLOGY, 22 woodcuts, post 

 Svo. cl., with Dr. Roget's bookplate and auto., 3s Qd ibidem, 1836 



5173 WALLER (Augustus Desire, F.R.S.) LECTURES on PHYSIOLOGY, I. Series: on ANIMAL 

 ELECTRICITY, illustrated, 8yo. buckram, 3s (p. 5s nett) 1897 



5174 WALLERANT (Frederic) GROUPEMENTS CRISTALLINS ; with 33 diagrams, post Svo. boards, 

 Is [1899] 



5175 WALLERIUS (Johan Gottskalk) MEDITATIONES PHYSICO-CHEMKLE de ORIGINE MUNDI, 

 imprimis Geocosmi, ejusdemque Metamorphosi ; with plate, sni. Svo. old parchment (back slightly 

 damaged, and some II. stained) ; rare, 8s Stockholmice, 1779 



The author was Bergman's predecessor as professor of chemistry at Upsala, and made some important investigations in 

 agricultural chemistry. The above work was unknown to Poggendorff. 



5176 WALLIS TAYLER (A. J., c.E.) MODERN CYCLES : a Practical Handbook on their Con- 

 struction and Repair, with over 300 illustrations, post Svo. cl. (out of print), 4s Qd (p. 10s Qd) 1897 



5177 - REFRIGERATION, COLD STORAGE, and ICE-MAKING : a Practical Treatise on the Art and 

 Science of Refrigeration, with 361 illustrations, Svo. cl., 10s (p. 15s nett) 1902 



5178 WALLON (Etienne) TRAITE ELEMENTAIRE de I'OBJECTIF PHOTOGRAPHIQUE ; with 135 wood- 

 cuts and diagrams, roy. Svo. sewn, 4s (p. F. 7.50 nett) 1891 



5179 WALMESLEY (Charles; O.S.B., F.R.S., Bp. of Rama) ANALYSE des MESURES, des RAPPORTS, 

 et des ANGLES : ou Reduction des Integrates aux Logarithmes, et aux Arcs de Cercle ; with 4 

 plates, 4to. old mottled calf, neivly rebacked, with bookplate of Edward 12th Duke of Norfolk, 

 E.M. (RARE), 17s Qd 1749 



5180 REIMPRESSION ; with Opiates, 4to. old tree-calf extra (fine copy), 18s 1753 



An extension and explanation of Cotes's ' Ilarmonia Mensurarum ' (q. v. ante). 



51S1 WALMSLEY (John) PLANE TRIGONOMETRY and LOGARITHMS, diagrams, post Svo. cl., 2s 

 (p. 5s) 1879 



5182 WALSH (David, M.D.) The RONTGEN RAYS in MEDICAL WORK, 2nd Ed., rewritten and 

 enlarged, with 31 plates and 72 other illustrations, vo. cl., 5s (p. 10s Qd nett) 1899 



