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



DIRCKS (Henry, c.E., f.r.s.e. ; inventor of Pepper's Ghost ') The Life, Times, and SCIENTIFIC 

 Labours of the Second Marquis of Worcester (1865)— v. Nos. 5507-8, ante. 



7306 Patent Monopoly as represented by Patent Law Abolitionists, impartially 



examined, 8vo. (pp. 32), sewn, 2s 6d 1869 



7307 Perpetuum Mobile ; or Search for Self-Motive Power, Cents. XVII. -XIX,, from various 



Authentic Sources, in Papers, Essays, Letters, Paragraphs, and numerous Patent Specifications, 

 with Introductory Essay, numerous woodcuts, post 8vo. cl. (very SCARCE), £1. 5* 1831 



7308 The Author's own Copy, with a large number of Original Drawings and MS. Text, 



aZso Cuttings, etc. added, and some MS. corrections in text, post 8vo. cl., £2. 15* 



the complete work : 



7309 Another Copy, with the Second Series : History of the Search for Self-Motive 



Power, ivith portraits, plates, and numerous woodcuts, 2 vols, post 8vo. cl. (fresh copies), 

 £3. 155 1861-70 



The only work that has ever been published on this still existing craze, containing inter alia all machines on the 

 supposed perpetual motion principle registered at the Patent Office. 



The second series, which contains the history of the subject, is excessively scarce, and practically unprocurable. 



7310 The Policy of a Patent Law, 8vo. (pp. 54), sewn, 2s Qd 1869 



7311 Scientific Studies : or Practical, in Contrast with Chimerical Pursuits : I. The Life of 



Edward Somerset, Second Marquis of Worcester, Inventor of the Steam Engine ; II. 

 Chimeras of Science : Astrology, Alchemy, Squaring the Circle, Perpetuum Mobile, etc., ivith 

 portrait of Lord Worcester, and 6 other plates, cr. 8vo. cl. {scarce), Is Qd 1869 



7312 Another Copy, cl., with author's inscr., 85 6c? 



7313 Statistics of Invention, illustrating the Policy of a Patent Law, 8vo. (pp. 48), 



sewn, 2s ^d 1869 



7314 DITTE (Alfred) Lecons sur les Metaux, profess^es h la Faculte des Sciences de Paris ; with 

 woodcuts, 2 \o\a. cr. 4t6. hf. cl., \2s 6d (p. F. 30 nett unbound) 1891 



7315 DOBSON (Edward, m.i.c.e.) Pioneer Engineering : Operations connected with the Settle- 

 ment of Waste Lands in New Countries, with 8 folding plates [linen-mounted), and 53 ivoodcuts, 

 cr. 8vo. hf calf neat, 3s 1877 



7316 Rudimentary Treatise on the Manufacture of Bricks and Tiles, with 83 woodcuts, 



2 vols. on Masonry and Stonecutting, with woodcuts, and 4to. Atlas, with IQ plates— 



3 vols. 12mo. in 1, and 1 vol. 4to. hf. morocco, 3s 6d 1850-49 

 7317 Both Works, with the Art of Building, 2nd Ed., with 111 ivoodcuts, 4 vols. 12mo. 



in 1, hf. morocco, 4? 1850-4-6 



7318 The Student's Guide to the Practice of Designing, Measuring, and Valuing Artificers' 



Works, with Tables of Constants, etc., 2nd Ed., with Additions by E. Lacy Garbett, with^ 

 folding plates, and numeroiis woodcuts, 8vo. cl., 3* 1852-3 



7319 Third Edition, with Tables for Squarijjg and Cubing, v-ith front, after G. E. 



Street, B.A., 8 folding plates, and numerous woodcuts, 8vo. cl., or, hf morocco gilt, 3s ^d 1858 



7320 DODD (George, resident Engineer under John Rennie) Historical and Explanatory Disser- 

 tation on Steam-Engines and Steam-Packets ; with the Evidence in full given by the most 

 eminent Engineers, Mechanists, and Manufacturers, to the House of Commons' Select Committee ; 

 together with the Committee's Reports, distinguishing and defining Safe and Unsafe Steam- 

 Engines, and their proper Management ; comprising Particulars of the FATAL Explosions of 

 Boilers, etc., concluding with a Narrative, by Isaac Weld, Esq., of the Interesting Voyage of 

 the Thames Steam-Yacht, from Glasgow to Dublin and London, loith 3 plates [including 2 

 aquatint ones of the 'Thames' and 'Sons of Commerce' Steam Yachts), 8vo. boards, uncut 



(VERY scarce), £1. lOs 1818 



' He is said to have been the lirst projector of steam-boats on the Thames.'— 1>. N. B., wliich does not mention the 

 above work. It was unknown to Watt, Lowndes, or AUibone, nor was there a cujiy in the Scott Library. 



7321 The Curiosities of Industry : Calculating and Registering Machines, 8vo. cl., 2s 1853 



7322 DODGSON (Charles Lutwidge, deacon; 'Lewis Carroll,' author of 'Alice in Wonderland') 

 Euclid and his Modern Rivals, with front, and diagrams, post 8vo. cl. [fresh copy) ; scarce, 

 £1. 105 1879 



7323 Another Copy, cl. [stamp on title), £1. 7* Qd 



'His one valuable contribution to mathematics is ' Euclid and liis Modern Rivals' (1871';. Many, excusably, refused 

 to accept the bonk seriously. It was dedicated to the memory of Euclid, and thrown into dramatic form, while scattered 

 up and down it were many jokes . . . But when stripped of its external eccentricities it was a really serious contribution 

 to Euclidean geometry, and went far to vindicate the unique position of Euclid's elements as a first text-book of geometry, 

 by a careful and systematic examination of the various treatises which had been produced by way of substitutes 

 iovit.'— D.N. B. 



7324 [ ] The Game of Logic, with front, and diagrams, first edition; also Envelope with 



Cardboard and 9 Counters, post 8vo. red cl. (scarce), 16* Qd 1887 



7325 DOELTEB (Comelio, Univ. Vienna) Petrogenesis ; w-ith plate and 5 other illustrations, 8vo. 

 sewn, is i)d (p. M. 7) Braunschweig, 1906 



7326 DOLEZALEK (Friedrich) The Theory of the Lead Accumulator (Storage Battery), trans, 

 by Carl L v. Ende, with 30 diagrams, post 8vo. cl., 5s (p. 10^ Qd nett) New York, 1904 



7327 DONALDSON (William, m.i.c.e.) Donaldson's Poncelet Turbine and Water-Pressure 

 Engine and Pump, with short Treatise on the Impulsive Action of Inelastic Fluids, 2 folding 

 plates, and diagrams, 4to. cl., 3s 1883 



7328 DONKIN (William Fishbum, f.r.s.) Acoustics; Theoretical, Part I (all pub.), ivith 

 diagrams, cr. 8vo. cL, with auto, of Prof . H. W. LI. Tanner, F.R.S., 3s Qd (p. Is Qd) 



Clarendon Press, Oxford, 1870 

 ' Devoteil to an enquiry into the vibration.s of strings and rotls, and giving evidence on every page of the combined 

 musical aiid mathematical talents of the author.'— 7^ryr, W. J Ilo.rrimu ' 



