HENRY SOTHERAN & CO., 140, STRAND, W.C, AND 37, PICCADILLY, W. 305 



5977 [BARLOW (Peter, f.r.s.)] Astronomy (Encyclopaedia Metropolitana), with 10 plates, 4to. 

 ^inbound, 2s [1822] 



5978 Another Copy : also, ex eadem [Herschel (Sir J.F. W., f.r.s.)] Physical Astronomy, 



plate: [Kater (Capt. Henry, f.r.s.)] Nautical Astronomy, 2 plates— 3 vols. 4to. in 1, hf. cl., 

 5s [1822-3] 



5979 On the Effects produced in the Rates of Chronometers by the Proximity of Masses of 



Iron, with plate, 4to. (pp. 31), sewn, 3* 6rf 1821 



5980 [ ] Electro-Magnetism (Ency. Metrop.), with 5 plates, 4to. unbound, 2s [1824] 



5981 Another Copy, also, ex eadem [Lunn (Francis, pr., f.r.s.)] Electricity, 5 plates: 



[Roget (P. M., M.D., f.r.s.)] Galvanism, 7>/a<c— 3 vols. 4to. in 1, hf. cL, 5s [1824-6] 



5982 Essay on Magnetic Attraction, and on the Laws of Terrestrial and Electro-Mag- 

 netism, 2nd Ed., much enlarged, with Q plates by Lou^ry, 8vo. hf. ca// (scarce), 12* 6rf 1823 



5983 Another Copy, sewn (slightly water -stained, and name cut off title), Ss 6d 



5984 Another Copy, with Appendix, containintr the Experiments made on Ship Board 



from Lat. 61" S. to Lat. 80° N., ttnth 6 plates, 8vo. c/., uncut (fresh copy), lbs Qd 1824 



' Giving the details of his cxporiiaent.s to devise a remedy for the large deviations of* the coiiijiass due to the increasing 

 quantities of iron used in the construction and tittinj^s of ships, and describint; a simple methinl of correctin}^ ships^ 

 ccmpasse.** by lixiug a small iron plate in such a i)Osition as to comiiensat^ all other attraetions, ... In the second 

 edition he succeeded in connecting the whole of his exi)erimental results by a mathematical theory based on a few simple 

 assumptions '.— D. jV. B. The author was moreover the first to notice the fact that the strenRth of the electric current is 

 the same in all places of the conduit— a discovery which enabletl Ohm to formulate his ' Law '. 



5985 Essay on the Strength and Stre.ss of Timber, founded on Experiments, with Historical 



Review of former Theories an<l Experiments, and Appendix on the Strenj^th of Iron, and other 

 Materials, 3rd Ed., corrected, with 6 folding plates on copper, 8vo. boards, uncut (SCARCE), 12» 1826 



'Barlow's merits were Jirst rendered conspicuous by tlie publication of an Efsay on the Strength of Timber, supplying 

 as the re.sults of numerous experiments in Woolwich Do.:kyanl, much-needetl data for the calculations of engineers. 

 The exi>eriment8 on the resistance of iron which formed the basis of the design for the Menai suspension bridge were 

 submitted by Telford to his examination, and were printed as an appendix to the third oiition [the above] of his ' Essay ' 

 {1826):— D. N. B. 



5986 [ ] Geometry (Ency. Metrop.), with 6 plates, 4to. unbound, 28 [1825] 



5987 Another Copy, hf. cl., 3* 



5988 [ ] Hydrodynamics (Ency. Metrop.), with 11 plates, 4to. unbound, 28 [1818-22] 



5989 Another Copy, hf cl., Ss 



5990 [ ] Mechanics (Ency. Metrop.), unth \0 plates, 4to. unbound, 28 [1818] 



5991 Another Copy, hf. cl., 3* 



5992 New Mathematical and Philosophical Dictionary, comprising the Terms and Prin- 

 ciples of Pure and Mixed Mathematics, with Historical Sketches, and the DiscovRries and 

 Vv ritings of the most Celebrated Authors, with 13 plates, and numerous diagrams, thick roy. 8vo. 

 calf, 66- Qd 1814 



5993 Another Copy, hf. calf (joint cracked), 5s 6d 



Containing an interesting article on Ak:rostation, with a plate illustrating a balloon tilled and in the process of filling. 



5994 New Mathematical Tables, containing the Factors, Squares, Cubes, Square and Cube 



Hoots, Reciprocals, and Hyperbolic Logarithms, of all Numbers from 1 to 10,000; Tables of 

 Powers and Prime Numbers ; an extensive Table of Formulae, or General Synopsis of the most 

 important Particulars relating to the Doctrines of Equations, Series, Fluxions, etc. etc. .etc., first 

 edition, 8vo. boards, uncut (scarce), 12* 1814 



•A vast mass of accurate and highly u.seful information.'— D. N. B. 'Unprecedented both for their ext«nt and 

 accuracy.' — Fmf. de Morqan. 



5995 [ ] Optics (Ency. Metrop.), with 10 plates, 4to. unbound, 2» [1819-23J 



5996 Another Copy, hf. cl., 3* 



5997 [ ] Pneumatics (Ency. Metrop), with 13 plates, 4to. unbound {one plate wanting), 



\s Qd [182;^] 



5998 On the Probable Electric Origin of all the Phenomena of Terrestrial Magnetism, 



4to. (pp. 12), sewn, with author^s inscr., 5s 1831 



' Describing an ingenious experiment (strikingly contirinatory of Ami>ere'8 theory) showing the precise similarity 

 between the action of the earth on the magnetic needle and that of a wooden globe colled round with copper wire carrying 

 a galvanic current.' -D. N. B. 



5999 Tables of Squares, Cubes, Scjuare Roots, Cube Roots, and Reciprocals of all Integer 



Numbers up to 10,000 [with Preface by Augustus de Morgan], post 8vo. cl., or, hf. calf, 

 3s ed 1840 



A reprint of the larger portion of the New Malhematical Tables (7. v. sv]>ra) in a s|H>cially readable type. 



6000 On the Temporary Magnetic Effect induced in Iron Bodies by Rotation, ;>/a/c, 



4to. (pp. 13), unbound, 38 1826 



6001 Treatise on the Manufactures and Machinery of Gt. Britain, with View of the 



Principles ot Manufactures by Charles Babbagb, f.r.s , with 87 Kteel plates, comprising 650 

 fgures of machinery and tools, thick 4to. new hf. buckram, 12j? 6</ 1836 



Including an account and illustrations of ' Locomotive Engines for Rail Roads and Common Roads ' 



6002 Treatise on the Strength of Timber, CA.sTand Malleable Iron, and other Materials; 



with Rules for Application, and Appendix on the Power of Locomotive Engines, etc. ; new Ed. 

 by J. V. Heather, with E.ssay on the Effects produced by causing Weights to travel over Elastic 

 Bars, by Robert Willis, pr., f.r.s., unth 9 folding plates, and woodcuts, 8vo. hf. morocco gilt, 

 7s 6d 18.'>l 



Constituting the fifth edition of the 'Essay on the Stn'r.gth' etc (7. v. mpra). It is Inten-stlng as containing invusr,- 

 igations by Prof. Willis lu another field tliau that lu which he U btst known- the growth and theory of Mediwval 

 Architecture. 



