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



178 ATTI della R. ACCADEMIA del LINCEI : Memorie della CLASSE cli SCIENZE FISICHE, 

 MATEMATICHE e NATURALI. Serie III a , v. 14, Serie IV a , v. 2, 4. 5 (1883-8), 9 v. roy. 4to. : 

 Trasunti. Serie IIP 1 , v. 4, 5, 8 (1880-3), 3 v. roy. 4to. : Rendiconti. Serie IV a , v. 1-3, 4, parts 1-5 

 (1884 March, 1888), 3 v. and 5 parts, 4to. together 15 vols. and 5 parts, with numerous plates, and 

 other illustrations; sewn, 2. 2s Roma, 1880-8 



179 della R. ACCADEMIA delle SCIENZE di TORINO: CLASSE cli SCIENZE FISICHE, 



MATEMATICHE e NATURALI, Vols. XX XXXVIII; with plates, 19 vols. roy. 8vo. sewn, as issued, 

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180 ATWOOD (George, Fellow of Trinity, F.R.S.) TREATISE on the RECTILINEAR MOTION and 

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 by Basire, large 8vo. very tall copy in old hf. C//(VERY SCARCE), 1. 10s Cambridge, 1784 



'In this work occurs (p. 298) the first description of the ingenious apparatus since so well known as ' Atwood's 

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181 _ _ ANALYSIS of a Course of LECTURES on the PRINCIPLES of NATURAL PHILOSOPHY, diagrams, 

 8vo. hf. calf, 8s Qd 1784 



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182 AUGUST (Ernst Ferdinand) Uber die FORTSCHRITTE der HYGROMETRIE in der neuesten Zeit; 

 with front, of the psychrometer, 4to. (pp. 30), sewn (scarce], Is Qd Berlin, 1830 



Containing a farther account of the author's invention of the psychrometer the wet and dry bulb hygrometer now 

 generally in use. Added i-< a 4-p. pamphlet by him, ' Neue Einrichtung des Psychrometers '. 



183 AUGUSTIN (A. Dubourg) : VERZAMELING van BERIGTEN, DICHTSTUKKEN en ARIA'S, betref- 

 fende de beide LUCHTREIZEN, welke door den Heere Augustin den 3 Sept. en den 1 Oct. 1806, in 

 AMSTERDAM ondernomen zijn; with coloured front, representing the ascent, 8vo. (pp. 34), sewn, 

 1. 5s Amsterdam, 1806 



A VERY RARE WORK, describing the first balloon ascent from Amsterdam. It was unknown to Hatton Tumor, who 

 mentions it neither in the Bibliography nor in the ' Roll of the first 500 Aeronauts ' contained in his ' Astra Castra '. 



184 A VILER (Augustin Charles d') COURS d'ARCHiTECTURE, qui comprend les Ordres de 

 VIGNOLE, plusieurs nouveaux Desseins, Orneraens et Preceptes, etc. etc., avec Explication alpha- 

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 brown calf gilt, 1 . 1 Os 1 720 



' Le cpurs a ete pendant pres d'un siecle le meilleur ouvrage de ce genre que Ton ent en France, et il est encore 

 recherche des curieux.' Brunei. 



185 AYRES (John) ARITHMETIC made EASIE, for the Use and Benefit of Trades-Men; 18th Ed., 

 with a Short and Easie Method after which Shop-keepers may State, Post, and Balance their 

 Books of Accompts, by CHARLES SNELL ; the Whole perused, and many Errours corrected by 

 E. HATTON, Gent , 16mo., boards (corner cut off title, and some pp. shorn), Qs Qd 1730 



'A work of the immediate school of Cocker'. Prof, de Morgan. 



186 AYRTON (William Edward, F.R.S.) PRACTICAL ELECTRICITY: a Laboratory and Lecture 

 Course, 180 woodcuts, post 8vo. cl., 3s (p. 7s Qd) 1887 



187 AYSCOUGH (James, Optician) SHORT ACCOUNT of the EYE and NATURE OF VISION, chiefly to 

 illustrate the USE and ADVANTAGE of SPECTACLES, 4th VA., front., 12mo. sewn, ( 2s 1755 



188 _ SHORT ACCOUNT of the NATURE and USE of SPECTACLES, -with a Kind of Glass for 

 Spectacles, preferable to any hitherto made use of, 12mo. (pp. 16), sewn, 2s 1750 



189 AZEMAR (L. P. V. M.) 'TRISECTION de 1' ANGLE, avec Recherches analytiques stir le meme 

 feujet, par J. G. GARNIER; with 3 folding plates, 8vo. sewn, 3s Qd 1809 



190 BABBAGE (Charles, F.R.S.) CALCULATING ENGINES : a Collection of Papers relating to them, 

 their History and Construction [ed. by his Son GENERAL HENRY P. BABBAGE], with portrait 

 and \5plates (some folding), large 4to. cl. (scarce), 1. Is 1889 



Including articles on Mr. Babbage by Gen. Menabrea and Sir G. G. Stokes, and the Royal Society's reports on the 

 Engines. 



191 : BABBAGE'S CALCULATING MACHINE ; or Difference Engine, exhibited in the S. Kensington 



Museum [by B. HERSCHEL BABBAGE], front., roy 8vo. (pp. 8), sewn, 2s 1872 



' Tlie essential novelty of Babbage's design consisted in setting wheelwork to develop the numerical consequences of the 

 law of any given series, thus ensuring the accurate calculation of an entire table without any further trouble of the operator 

 than a few original adjustments. The mathematical principle selected by him as the basis of his invention was the 

 ' method of differences,' by which it appears that the numbers composing nearly all arithmetical series can be formed by 

 the repeated addition to fundamental numbers of a common difference or ' element 'a process eminently capable of 

 being performed by a machine.' Miss A. M. Clerke. 



192 On the ECONOMY of MACHINERY and MANUFACTURES, 2nd Ed., enlarged, with vignette 



portrait of Roger Bacon, 12mo., hf. bound, 3? Qd 1832 



193 - THIRD EDITION, enlarged, vignette portrait, 12mo. cl., 4s Qd 



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194 _ _ EXAMPLES of the SOLUTIONS of FUNCTIONAL EQUATIONS, plate, 8vo. (pp. 42), sewn, 3s [1820] 



v. PEACOCK, post. 



195 The NINTH BRIDGEWATER TREATISE : a Fragment, woodcuts, 8vo. cl., uncut, 5s 



]96 SECOND EDITION, 8vo., hf. calf gilt (nice copy], Is Qd 1838 



197 - ANOTHER COPY, cl., with AUTHOR'S INSCR. AND AUTO. LETTER TO WILLIAM SMEE, 

 F.R.S., 10s Qd 



In the auto, letter the author expresses his gratitude to Mr. Since ' for the information you have so kindly assisted liiiu 

 in obtaining ' [for the above work]. 



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

 ment of tie universe by law, which vindicated the serviceableness of mathematics to religion." D. N. 1',. 



198 PASSAGES from the LIFE of a PHILOSOPHER, with front, of the author's invention, the 

 1 Difference Engine (No. 1),' 8vo. cl., 8s Qd 1864 



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

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

 Kensington Museum. 



