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



6955 CLIFFORD (C.) How to LOWER SHIPS' BOATS : a Treatise on the Dangers and Defects in the 

 System at present in Use, and their Remedy, with Description of a NEW and IMPROVED BLOCK 

 to be used for REDUCING and REGULATING STRAIN in lowering Heavy Bodies, etc., 2nd Ed., with 

 numerous plates, 8vo. (pp. 27), sewn (some corners torn off") ; scarce, 7s Qd 1855 



Added are reports oh the Trials made with the author's apparatus. There was no copy of the above in the Scott Library. 



6956 CLIFFORD (G. H.) Een WOORD over de CARiBOU-MiJN; with coloured folding plate, roy. 8vo, 

 (pp. 16), sewn, 2s 6d 's Gravcnhage [1873] 



6957 CLIFFORD (William Kingdon, F.R.S.) MATHEMATICAL PAPERS, edited [with Life and 

 Bibliography] by ROBERT TUCKER, with Intro, by H. J. STEPHEN SMITH, F.R.S., fs. of MS., and 

 diagrams, thick 8vo. cl., 1. 1* 1882 



The above volume consists of a large number of mathematical papers, largely unpublished, and includes among some 

 reviews a most interesting one of Prof, de Morgan's Budget of Paradoxes. 



6958 On the CLASSIFICATION of Loci, roy. 4to. (pp. 20), sewn, 3s Qd 1878 



'Belonging to the classics of mathematical literature.' Sir Leslie Stephen. 



6959 The COMMON SENSE of the EXACT SCIENCES [edited and partly written by KARL 



PEARSON, F.R.S.], with 100 diagrams, cr. 8vo. cl., 2s 6d (p. 5s) 1885 or '98 



6960 - ELEMENTS of DYNAMIC : an Introduction to the Study of Motion and Rest in Solid and 



Fluid Bodies, Part I : KINEMATIC [Books I IV, and Appendix (all pub.)] , illustrated, 2 vols. 

 cr. 8vo. cl., 7s (p. 13s Qd) 1878-87 



In this work, which was never completed, the author first introduced the graphical and geometrical methods of 

 Mobius, Culmann, etc., as applicable to elementary mathematics. 



6961 LECTURES and ESSAYS, edited by SIR LESLIE STEPHEN and SIR FREDERICK POLLOCK, 



with Intro, [biographical and bibliographical] by the latter, 2nd Ed., with steel portrait, cr. 8vo. 

 cl., 5s (p. 8s Qd) 1880 



'Clifford was one of the earliest mathematicians of the latter half of this century to advocate the use of graphical 

 and geometrical methods in preference to analysis. His remarkable felicity of illustration and power of seizing analogies 

 made him one of the most brilliant expounders of mathematical principles.' W. W. 11. Ball. 



6962 CLflTER (Florian, Pfarrer zu Schonbrunn, Bayern) Das TROCKNEN und DORREN mit ERHITZTER 

 LUFT, nach einer eigenthiimlichen und erprobten Weise, wo durch wenig Auf wand an BrennstofT 

 bei volliger Feuersicherheit ein schnelles und bequemes Trocknen erreicht wird ; with 10 litho- 

 graphs, 8vo. sewn (scarce), 12s Qd Hof, 1837 



The author claims to have been the first to invent a contrivance by which liax, hemp, hops, etc., can be dried by 

 currents of heated air, with a considerable saving of fuel, and safety from danger by fire. The work was unknown t<> 

 Poggendorff. 



6963 CLOWES (Frank, F.I.C., Chief Chemist, L.C.C.) TREATISE on PRACTICAL CHEMISTRY, and 

 QUALITATIVE ANALYSIS, 5th Ed., with front., and 57 woodcuts, post 8vo. cl., 2s (p. 7s Qd) 1890 



6964 , and J. Bernard COLEMAN : QUANTITATIVE CHEMICAL ANALYSIS, 6th Ed., with 125 



woodcuts, thick post 8vo. cl., 4s Qd (p. 10s) 1903 



6965 COCKER (Edward) : COCKER'S ARITHMETIC : being a plain and familiar Method, suitable to the 

 meanest Capacity, for the full Understanding of that Incomparable Art ; perused and published by 

 JOHN HAWKINS, by the Author's correct Copy, 14th Ed., carefully corrected, with Additions, with 

 rude engraved portrait, 18mo. contemporary sheep (binding damaged, a number of II. wormed, and 

 one defective], Ss 1712 



6966 FIFTY-SIXTH EDITION, carefully corrected and amended by GEORGE FISHER, Accomptant, 



with still ruder woodcut portrait, 16mo. sheep (sound copy), 10s 1767 



One of the last editions published of this well-known work, the most popular book on arithmetic for over a century, and 

 still a commonplace for arithmetical accuracy. 



6967 : COCKER'S DECIMAL ARITHMETIC, with Tables of Interest and Rebate .... his ARTI- 

 FICIAL ARITHMETIC, shewing the GENESIS or Fabrick of the LOGARITHMS . . . his ALGEBRAICAL 

 ARITHMETIC, etc. etc., perused, corrected, and published by JOHN HAWKINS, 4th Ed., with 

 diagrams, 12mo. large copy in old panelled sheep, 10s Qd 1713 



Both the above works were supposed by Prof, de Morgan to be forgeries, a view however since discredited. The latter 

 contains commendatory poems by William Leybourn, William Salmon, etc. 



6968 COCKLE (Sir James, F.R.S. ; C. J. of Queensland) On DIFFERENTIAL EQUATIONS, Total and 

 Partial ; and on a new Soluble Class of the First and an Exceptional Case of the Second, 8vo. 

 (pp. 16), sewn, Is Qd n. d. 



6969 



and inter. ' Given to me by Sir Jas. Cockle, F.R.S.', 15s 1864-7 / 



' He determined the explicit form of a sextic equation, on the solution 01 which he showed that that of tlie general 

 quintic depended. . . . Cockle's contributions to the theory of differential equations were also noteworthy. He found 

 that from any rational and entire algebraic equation of the degree n, whereof the coefficients are functions of a single 

 parameter, it is possible to derive a linear differential equation of the order n 1, which is satisfied by any one of the root* 

 of the algebraic equation. From this discovery the theory of differential resolvents was evolved. He was the first to 

 discover and develop the properties of those functions called criticoids or differential invariants.' D. N. B. 



6970 COCKSHOTT (Arthur), and Frank Bridgman WALTERS : TREATISE on GEOMETRICAL 

 CONICS, with diagrams, cr. 8vo. cl., 2s Qd (p. 5s) 1889 



6971 CpDDINGTON (Henry; Vicar of Ware; F.R.S.) ELEMENTARY TREATISE on OPTICS, 2nd 

 Edition, with 8 folding plates, 8vo. boards, 5s Cambridge, 1825 



'The first attempt to make English students acquainted with modern methods of investigation in optics. 1 MM 

 Agnes M. Clerke. 



6972 [ ] INTRODUCTION to the DIFFERENTIAL CALCULUS on ALGEBRAICAL PRINCIPLES, 8vo. 

 (pp. 43), sewr (scarce), 5s ibidem [1825] 



6973 TREATISE on the REFLEXION and REFRACTION of LIGHT, with 10 folding plates, 8vo. 



boards (SCARCE), 10s Qd ibidem, 1829 



Containing a very complete investigation of the iaths of reflected and refracted rays.' Mix? A. M. Cleric. 



