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



5886 BABBAGE (Charles, f.k.s.) On the Influence of Signs in Mathematical Reasoning, with 

 diagrams, 4to. (pp. 53), seiun, with author's inscr., 5* Cambridge, 1826 



5887 On a Method of Expressing by Signs the Action of Machinery, with 3 plates and 



folding chart, 4to. sewn, with AUTHOR'S iNSCR., 7* Qd 1826 



Containing the first account of the author's invention of a scheme of notation applicable to the interpretation of all 

 mechanical actions whatever. 



5888 The Ninth Bridgewater Treatise : a Fragment, second Edition, with woodcuts, 8vo. 



calf extra {fine copy), ^s 1838 



5889 Another Copy, cl., with author's inscr. ; or, hf calf, 5s 



'A work nobly planned, remarkable as one of the earliest attempts to reconcile breaches of continuity with the 

 government of the universe by law, which vindicated the serviceableness of mathematics to religion.' — D. N. B. 



5890 Observations on the Notation employed in the Calculus of Functions, 4to. (pp. 14), 



sewn, 2s 6d Cambridge, 1820 



5891 Passages from the Life of a Philosopher, with front, of the author's invention, the 



'Difference Engine (No. 1),' 8vo. cl., 7s 6d 1864 



Largely autobiographical, and containing a copious account of his inventions, including his calculating machine, which 

 cost the nation £17,000, and himself 19 years' unpaid work, and is now preserved in an unfinished state in the South 

 Kensington Museum. 



A VERY INTERESTING COPY: 



5S92 Another Copy, extended by the insertion of 88 Holograph Letters from well- 

 known Scientists, etc., mentioned in the work (as under), many being- addressed to Faraday, 

 also interesting cuttings, etc., thick 8vo. hf. brown calf extra, uncut, t. e. q. (a most interesting 

 volume), with fine etched bookplate of Frederick Hendriks, F.S.S., £12. 12.? 



List of Autograph Letters:— Airy (Sir George Hlddell), Astronomer iioi/a/, 1801-02 (3) : Arnott (Neil), m.d., f.r.s., 

 1788-1874 (1): Babbagk (Charles), f.r.s., 1792-1871 (3): Babb.a.oe (Henry P.), general (2): Babington (William), m.d, 

 v.Vi.s., mineralogist, 176()-1S33 (1) : Baily (Francis), y.r.s., astronomer, 1774-1844 (\): Barry (Sir Charles), architect of the 

 Huuses Oj' Parliament, 1795-1860(1): Beaufort (Sir Francis), admiral, 1774-18.57 (I): Bruxel (Sir Marc Isambard), builder 

 of the Thames Tunnel, 1769-1819 {i, with original announcement of Opening of the Tunnel): Buckland (William), f.r.s.. 

 Dean of Westminster, 1784-1856 (2): Chalus (James), f.r.s., astronomer, 1S03-S2 (1): Children (John George), fr.s., 

 1777-1852 (1): Dalton (John), f.r.s., propounder of the Atomic Theory, 17(56-1844 (1): Douglass tSir James Nicholas), 

 f.rs., engineer, 1826-98 (1): Fairholt (Frederick William), fs.a., antiquary, 1S14-C6 {Original Poem): Faraday (Michael), 

 f.r.s., 1791-1867 (2): Gilbert (Oavies), p.r.s., 1767-1839 (1): Gregory (Olinthus Gilbert), vuithematician, 1774-1841 

 (1): Harris (Sir William Snow), f.r.s., electrician, 1791-1867 (2): Hatchett (Charles), f.r.s., chemist, 1765 ?-1847 (2): 

 Hendricks (Frederick), f.s s. (2): Henry (William), m.d., f.r.s., chemist, 1774-1836 (3): Jardine (George), pn/essor of 

 Greek, Glasgow, 1742-1827 (1) : La Bf.che (Sir Henry Thomas de), geologist, 1796-1855 (4) : Lansdowne (Henry 3rd Marquess 

 of), 1780-1863 (1): Lemon (Sir Charles), m.p. (2) : Lyell (Sir Charles), geologist, 1797-1«75 (1) : Mantell (Gideon Algernon), 

 F.R.S , geologist, 1790-1852 (2) : Mawk (John), mineralogist, 1764-1829 (1) : Murchison (Sir Roderick Impey), geologist, 1792- 

 1871 (2) : Oersted (Hans Christian), discoverer of electro-magnetism, 1777-1851 (1, writ'en in English) : Ommanney (Sir John 

 Acworth), admiral, 1773-1855(1): Owen (Sir Richard), vaturalist,'\80\-92 (3): Powell (Baden), p/-., v.-rs., ^avilian Prof, 

 (feometry, Oxon., 1796-1860 (1): Quetjilet (Lambert Adolphe Jacques), mathematician, 1796-1874 (.^ignatnre): Ross (Sir 

 John), A7-ctic explorer, 1777-1856 (1) : Sabine (Sir Edward), general and astronomer, 1788-1883 (2): Smyth (William Henry), 

 F.R.S., admired and astronomer, 1788-1865 (4) : Stanhope (Philip Henry 5th Earl), historian, 1805-75 (1): Talbot (William 

 Henry Fox), f.R.s, inventor of photography, 1800-77(3): Thom.son (Thomas), m.d., f.r.s., c/i?niis(, 1773 18.52(1): Tupper 

 (Martin F&rqiih&r), platitvdinnvs philosopher, 1810-89(1): Turner (Sharon), f.s. a., hi.'^torian, 1768-1847(1): Ure (Andrew), 

 M.D., f.r.s., chemist, 1778-1857(1): Wag horn (Thomas), pioneer of the Overland Route, 1800-50 (1): Wallioh (Nathaniel), 

 MD., F.R.S., botanist, 1786-1854 (1): Wright (Thomas), f.s.a., autiquary, 1810-77 (1): Yates (James), f.r.s., an^i^nari/, 

 1789-1871 (1) : AND A few others. 



5893 Reflections on the Decline of Science in England, and on some of its Causes, Svo. 



boards. Is iSd 1830 



' An outspoken attack on the management of the Royal Society, which contributed materially to the origin of the 

 British Association in the following year.' — D. N. B. 



5894 Table of the Logarithms of the Natural Numbers, from 1 to 108000, 4th Impression, 



printed on yellow paper, roy. Svo. hf bound, 5s 1841 



5895 Third Edition, printed for the Hungarian Academy of Sciences [with Special Preface in 



German by Karl Nagy, and Intro, in En<^lish, (Tcrman, and Hungarian], printed on thick yellow 

 paper, roy. Svo. cl., uncut, with auto, of C. M. Willich [of the ' Tithe Computation Tables'), Qs 1834 

 ' Babbage's TaUe of the Logarithms is the best for ordinary use. Great pains were taken to get the maximum of clearness. 

 The change of figure in the middle of the block of numbers is marked by a change of typ^ in the fourth figure, which is the 

 best method that has been used. Copies of the book were printed on paper of different colours— yellow, brown, gieen, 

 etc.— as it was considered that black on a white ground was a fatiguing combination for the eye.' — J. W. L. Gla'sher, t'.RS. 



5896 , Sketch of the Analytical Engine invented by, by [General] L. F. JMknabrea, of 



Turin, with Notes by the TrSinB]{itor, folding table, Svo. (pp. 36), sewn, 4s 6d 1843 



An intere.st'ing conjunction of a patriot of the Eisorgimento and an English veteran of Science. 



5897 , and Sir John Frederick William HERSOHEL, f.r.s. : Account of the Repetition 



of JVI. Arago's Experiments on the Magnetism manifested by various Substances during the 

 Act of Rotation, 4to. (pp. 30), seivn, with inscr. 'From the Authors' to Peter Barlow, F.R.S , 

 As 6rf 1825 



5898 BABINGTON (John, Gunner, and Student in the Mathematicks) Pyrotechnia : or a Discourse 

 of Artificiall Fire- Works for Pleasure : in which the true Grounds of that Art are plainly 

 and perspicuously laid downe : Together with sundry such Motions, both Straight and Circular, 

 performed by the helpe of Fire, as are not to be found in any other Discourse in any Language ; 

 with a short Treatise of Geometrie, contayning certaine Definitions and Problemes . . . with 

 Tables for the Square Root to 25,000, and the Cubick Root to 10,000 Latus, wherein all Roots 

 under those Numbers are extracted onely by Ocular Inspection, with finely engraved title in 

 compartments by J. Droeshout, including portrait act. 31, and numerous fine copperplates (2 

 folding), besides woodcuts, folio, contemporary calf {back mended, also engraved title mended, and 

 printed title and one I. margined), RARE, £2. 2s Thomas Harper, for Ralph Mab, 1635 



5899 Another Copy, contemporary calf, newly rebacked {wanting engraved title and 2 folding 



plates, but a fine and tall copy), £1. 5* 



' The logarithmic tables, which form the third part of the book, were the earliest published in England/— D. 2Vi B. 



