HENRY SOTHERAN & CO., 140, STRAND, W.C, and 43, PICCADILLY, W. 491 



9790 JENKIN (Henry Charles Fleemingr, f.r.s.) Bridges: an Elementary Treatise on their 

 Construction and History (from Ency. Brit), with 2 plates and 133 woodcuts, 4to. cL, 2s 6d 



Edin., 1776 [sic, recte 1876] 



9791 Electricity and Magnetism, first edition, with 174 woodcuts and diagrams, cr. 8vo. 



cl.y 2s 1873 



9792 Seventh [Final] Edition ; rvith 177 woodcuts and diagrams, cr. 8vo. cl., 2s 1883 



'Marking a new departure in the exposition of electricity, as the first text-book containing a sjstematic application of 

 the quantitative methods inaugurated by the Biitish Association Committee on Electrical Standards.'— 7,on/ Kdcin. 

 The Oth was the last edition revised by the author, and the 7th is a reprint. 



9793 Four Lectures on Electrical Measurements, at the Royal En<,aneer Establishment, 



Chatham, written by Capt. R. H. Stotherd, r.e., and corrected by the Lecturer, with 19 

 woodcuts, 8vo. (pp. 74), hf. bound {very scarce), Hs Qd [1867] 



970 ^ Papers Literary, Scientific, etc., edited by [Sir] Sidney Colvin and [Sir] James 



Alfred Ewing, f.r.s., with Memoir (pp. 170) by Robert Louis Stevenson, with portraits, 

 plates, and numerous diagrams, 2 vols. 8vo. cl., uncut [scarce), £1. \s 1887 



Much valued not only for the biography by R. L. Stevenson, but also for the high scientific value of the papers them- 

 selves. It includes a ' Note on the Contributions of Fleeming Jenkin to Electiical and Engineering Science ', by Lord 

 Kelvin, as well as the author's Papers on ' Telpherage', Submarine Telegrajihy, etc. etc., and a List of his Patents. 



* In practical engineering thoroughness and soundness marked all Jenkin's work. His determiriative woi'k in electricity 

 is of the highest value, while his varied originality as an inventor is testified by his 35 British patents, and by his scientific 

 papers.'— G. T. Bettany. 



9795 : Reports of the Committee on Electrical Standards appointed by the British 



Association, revised by William Thomson [Lord Kelvin], J. Clerk Maxwell, and Fleeming 

 Jenkin, ff.r.s., with the latter'a Report on Units of Electrical Resistance, and his Cantor 

 Lectures [on Submarine Telegraphy], 7 folding plates, and diagrams, 8vo. cl. [very scarce), 

 l7sQd ' 1873 



'The experimental work of first making practical standards, founded on the absolute system, which led to the unit now 

 known as the British Association ohm, was chiefly performed by Clerk Maxwell and Jenkin. "The realisation of the great 

 practical benefit which has resulted from the experimental and scientific work of the Committee is certainly due to Jenkin's 

 zeal and perseverance as secretary, and as editor of the Collected Reports . . . The volume of Reports included Jenkin's 

 Cantor Lecture 'On Submarine Telegraphy', through which the practical applications of the scientific principles . . . 

 became part of general knowledge in the engineering profession '.—Lord Kelcin. 



9796 JERBABD (George Birch) Essay on the Resolution of Equations, 8vo. sewn, 3* %d 1859 



9797 On a Method of Transforming Equations by Means of Symmetric Functions, 



8vo. (pp. 10), sewn, 2s 1853 



^798 Reflections on the Resolution of Algebraic Equations of the Fifth Degree, 



8vo. (pp. 30), sewn, 2s 6d 1845 



The autlior's work was especially important in connexion with the solution of quintic equations, ' which he reduced to 

 the trinomial form by an extension of the method of Tschirnhauscn ' (Prof. Cajori). 



9799 [JESSOP (William), and Bobert MYLNE; f.r.s.]: [Three] Reports of the Engineers 

 appointed by the Commissioners of the Navigation of the Rivers Thames and Isis, to 

 Survey the State of the said Navigation from Lechlade to Days Lock [and Whitchurch] ; 

 with Orders of the Commissioners on the said Reports, and Account of the Tolls payable on the 

 said Navigation from Cricklade to Stanes, with folding map, 3 vols. 8vo. in 1, old hf. calf, 8* 



1791- Ox/or^, 1791 

 Undertaken for the barge traflic on the Upper Thames in connexion with the Thames and Severn Canal. At this time 

 the river was full of weirs, over which the barges were got by means of flashes, for which in dry weather they often had 

 to wait for days at a time. 



^SOO JEVONS (William Stanley, f.r.s.) The CovL Question: an Inquiry concerning the 

 Progress of the Nation, and the Probable Exhaustion of our Coal-mines ; 2nd Edition, 

 revised, with frontispiece, 8vo. cl., with auto, of E. Whympcr, 4* 6rf (p. 10* M) 1866 



9S01 Third [last] Edition, edited by A. W. Flux, with 2 plates, 8vo. cl.y Is (p. 10* 



nett) 1906 



' He argued that within a century the want of coal would seriously check our material progress , . . J. S. Slill referred 

 to the book as being almost exhaustive of its subject, and as having proved unanswerable in its conclusions.' — D. N. B. 



9802 On the Inverse, or Inductive, Logical Problem, 8vo. (pp. 12), sewn, \s Qd 1872 



9803 The Principles of Science : a Treatise on Logic and Scientific Method ; Library 



Edition, with front, of the Logical Machine, 2 vols. 8vo. cl., uncut (o. p.), 12s 6d (p. £1. 5s) 1874 



9804 New Edition, printed in smaller type, with front., post 8vo. cl., 6s 6d (p. 12s 6d) 



^f" -^ '^ 1877, or '83 



His most important w^ork, with illustrations derived from almost every branch of science, wherein 'he developed his 

 theory of logic and scientific method, and of its applications beyond and, so to speak, above the sphere of physical 

 science alone. It proved more stimulative to mathematicians than to metaphysicians '.— D. N. B. 



' W. S. Jevons in his Principles of Science founds induction upon tlie theory of inverse probability.'— Pro/ Cayori. 



9805 Pure Logic, or the Logic of Quality apart from Quantity, with Remarks on Boole's 



System, and on the Relation of Logic and Mathematics, first edition, post 8vo. cl., with author's 

 inscr. to Herbert Spencer {as below), and the latter's bookstamp, 10s Qd 1864 



• Herbert Spencer Esq. from the Writer. Manchester Jan. 1866.'— Inscr. on Jlyleaf. 



Founded on Boole's * Laws of Thought ' (q. v. ante), but divested of the latter's mathematical dress, ' which, to say the 

 least, is not essential to it.'— Pre/ace. 



9806 Studies in Deductive Logic : a Manual for Students, with front, of ancient logical 



diagrams, cr. 8vo. cL, 3s Qd (p. 6s) 1880 



9807 Another Copy, d., with Herbert Spencer's bookstamp^ As 



9S08 JOBARD (J. B. A. M.) Les NouvELLES Inventions aux Expositions Universelles ; 

 with ivoodcuts, 2 vols, 8vo. in 4 parts, sewn, 3s Qd Bruxelles, 1857-8 



9309 JOHN (Joliann Friedrich; Unio. Berlin) CilEMlsCHES Laboratorium, oder Anweisuno 

 zur CHEMISCHEN ANALYSE der Naturalien, nebst Darstellung der nothigsten Reagenzien, mit 

 Vorrede von Martin Heinrich Klaproth ; with 2 plates, 8vo. sewn, os Berlin, 1808 



