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



6631 BURNET (R.) A Word to the Members of the Mechanics' Institutes, with 6 crazi/ plates 

 by G. Banks, 8vo. (pp. 146), old calf, 45 Qd Devonport, 1826 



The last plate illustrates a departed scientific man undergoing destructive distillation in a retort, while his surviving 

 friends light their pipes at his gas. 



6632 BXJRNHAM (Sherburne Wesley, f.r.a.s.) Examination of the Double-Star Measures of 

 the Bedford Catalogue, 8vo. (pp. 36), sewn. Is Qd 1880 



6633 BURNS (Arthur, Tarporlcy) Geod^sia Improved ; or a New and Correct Method of Survey- 

 ing made exceedingly easy, with Appendix concerning the practical Methods of measuring Timbe/-, 

 Hay, Marl Pits, Bricklayers and Plaisterers Work, with 5 folding plates, besides diagrams, 8vo. 

 old calf {one joint broken), 5s Chester, 1771 



6634 BURNSIDE (William Snow), and Arthur William PANTON, Fellows T.C.D.: The 

 Theory of Equations : with Introduction to the Theory of Binary Algebraic Forms, 2nd Ed. 

 [enlarged], thick 8vo. cL, is Qd (p. 12* 6d) " Dublin, 1886 



6635 Third Edition [enlarged], thick 8vo. cL, 6s 6d (p. 15*) ibid., 1892 



6636 BURR (Frederick) Descriptive Notice of the Consolidated and United Mines, Corn- 

 wall : Comparative View of celebrated Mines in Europe and America, with 3 folding plates, and 

 folding table, post 8vo. (pp. 52), sewn, 4s 1835 



6637 Descriptive Notice of Quicksilver Mines in Rhenish Bavaria, and the Geological 



Structure of the surrounding Country ; with the Theory of the Formation of Mineral Veins, wood- 

 cuts, post 8vo. (pp. 32), sewn, 3s 1837 



6638 On Metalliferous and Mineral Deposits, Part I : Classification, and General De- 

 scription of Vein Formations. On the Mexican Process of Amalgamation, and the Occurrence 

 of the Precious Metals in Gt. Britain, woodcuts, post 8vo. (pp. 63), sew)i, 4s 1836 



6639 BURRARD (Col. Sidney Gerald, r.e., f.r.s.) The Indo-European Arcs from Karachi to 

 Greenwich : Electro-Telegraphic Longitude Operations executed during 1894-6, with 

 portrait of Gen. J. T. Walker, RE,, plates, and maps, 4to. cl., 8s Dehra Dun, 1901 



6640 BURRELL (Edward J.) Elementary Building Construction and Drawing, 5th Ed. ; 

 ivith 308 woodcuts, cr. 8vo. cl. , Is Qd 1895 



6641 BURRI (Romolo) Sulle Forme e Caratteri dell' Architettura Civile, e sulle Cause delle 

 loro Variazioni, 4to. sewn, 3s Roma, 1873 



6642 Saggio sulla Stabilita della Cupola di S. Pietro in Vaticano ; with 2 folding plates, 



4to. sewn, 3s Qd ibidem, 1849 



6643 BURROWS and COLTON'S Concise Instructions in the Art of Retouching, with 

 4 plates, besides woodcuts, Svo. cl. {wanting two negatives), 3s Qd 1876 



6644 BURTON (W. K. ; a.m.i.c.e., Tokio Univ.) Practical Guide to Photographic and Photo- 

 Mechanical Printing, with numerous woodcuts, cr. 8vo. hf calf neat {title stamped), 3s 1887 



6645 The Water Supply of Towns, and the Construction of Waterworks, 2nd Ed., 



extended [with the Effects of Earthquakes on Waterworks, by John Milne, f.r.s., and on Sand 

 Dunes and Dune Sand as a Source of Water Supply, by John de Ruke, c.e.] , with 46 plates, and 

 numerous other illustrations, impl. 8vo. buckram, 12s (p. £1. 5s) 1898 



6616 BUSCA (Gabriello, Milanese) Delia Espugnatione et Difesa delle Fortezze 'Libri Due, di 

 nuova corretti et ampliati ; aggiontovi I'Instruttione de' Bombardieri, ecc. ; with \0 folding plates 

 of warlike operations, fortification, etc., and numerous other woodcuts, 4to. hf. Spanish morocco gilt, 

 g. e. {some II. browned and a few wormholes, otherwise a fine copy) ; RARE, £1. 5s Turino, 1598 



6647 BUTLER (William) Arithmetical Questions, on a New Plan ; intended to answer the 

 double Purpose of Arithmetical Instruction and Miscellaneous Information, edited by Thomas 

 Bourn, 12th Ed., enlarged by George Frost, 12mo. unbound, 3s Qd 1838 



Almost the only entertaining arithmetic ever written. 



6648 BYRNE (Austin Thomas, c.e.) Treatise on Highway Construction : a Text-Book and 

 Work of Reference for those engaged in the Location, Construction, or Maintenance of Roads, 

 Streets, and Pavements, with 249 looodcuts, Svo. (pp. 686), cl., 8s Qd (p. £1. 5s) New York, 1892 



6649 BYRNE (Oliver) The Doctrine of Proportion clearly developed, on a Comprehensive, Original, 

 and very Easy System ; or, the Fifth Book of Euclid simplitied, 8vo. boards, or, cl., 3s Qd 1841 



6650 Dual Arithmetic, a New Art, both Parts, with Analysis, with diagrams, 3 vols. 



Svo. cl. {Analysis sewn) ; scarce, 15s 1863-7 



'The plan is to throw numbers into the form aCl-l)"^ (1-01)<; (rO0l>i . . . and to operate with this form. This is an 

 ingenious and elaborate speculation ; and I have no doubt the author has practised his method until lie could surprise any 

 one else by his use of it. . . . An effective predecessor in the same line of invention was the late Thomas Weddlk, in his 

 'New, Simple and General Method of Solving Numeric Equations of all Orders, 1842' [v. No. 5306, ante].—ProJ. de 

 Morgan's Budget of Paradoxes. 



6651 Essential Elements of Practical Mechanics, based on the Principle of Work, 2nd 



Ed., with 148 woodcuts, cr. Svo. cl., 3s (p. 7s Qd) 1872 



6652 Short Practical Treatise on Spherical Trigonometry, containin^^ a few Simple 



Rules by which the great Difficulties encountered are effectually obviated, woodcuts, post Svo. 

 sewn, 3s 1835 



6653 Treatise on Navigation and Nautical Astronomy, with Tables in which each 



Number can be instantly tested, or easily and independently calculated, with 41 woodcuts, 

 cr. 4to. cl. {cover slightly damaged), 7s Qd (p. £2. 2s) Jersey City, 1875 



6654 The Young Dual Arithmetician, or Dual Arithmetic : a New Art ; with Tables of 



Ascending and Descending Logarithms, Dual I^umbers, and Corresponding Natural Numbers, 

 post Svo. c/., 4s 1866 



6655 The Young Geometrician ; or Practical Geometry without Compasses, with 53 



diagrams {mostly coloured), and brass rule in pocket, roy. Svo. cl., Qs 1865 



