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



14884 SIMPSON (Thomas, f.r.s.) Miscellaneous Tracts on some Curious, and very Interesting 

 Subjects in Mechanics, Physical- Astronomy, and Speculative Mathematics, wherein the 

 Precession of the Equinox, the Nutation of the Earth's Axis, and the Motion of the Moon in her 

 Orbit, are determined, with 3 plates, 4to. old calf, or, hf. calf (joints cracked) ; rare, 8s 1757 



14885 Another Copy, contemporary calf {fine copy), with armorial bookplate of James 



Hustler of Acklam, 1730, 12s 



'ContaiiiiDg his best known investigations . . . the eighth memoir contains a discussion of the 3rd and 9th section of 

 the Principia, and their application to the lunar orbit. He obtained therein a differential equation for the motion of the 

 apse of the lunar orbit similar to that arrived at by Clairaut, but instead of solving it by successive approximations he 

 deduced a general solution by indeterminate coefficients '.—W. W. R. Ball. 



It also contains : A very exact Method for finding the Place of a Planet in its Orbit : The Advantage of taking the Mean 

 of a Number of Observations in Practical Astronomy : Resolution of certain Fluxionary Equations by Means of the Measures 

 of Angles and Ratios : Investigation of a General Rule for the Resolution of Isoperimetrical Problems, etc. etc. etc. 



14886 Select Exercises for Young Proficients in the Mathematics, first edition, with 



diagrams, 8vo. old calf {slightly damaged), 3s Qd 1752 



' Containing the solutions of numerous problems and a theory of gunnery.' — W. W. R. Ball. 



14887 New Edition, with Life by Charles Hutton, f.r.s., wz7A diagrams, 8vo. old calf , 



or, hf. calf {backs damaged), 3s 1792 



14888 Another Edition, revised by J. H. Bearding, with diagrams, 8vo. boards, vncnt, 3s 1810 



14889 Trigonometry, Plane and Spherical, with the Construction and Application of 



Logarithms, 3rd Edition, with diagrams, 8vo. sewn {rare), 4s 1779 



14890 Another Copy, 8vo. old calf, 5s 



' In this he introduced the current abbreviations for the trigonometrical functions.'— W. W. R. Ball. 



14S91 The Same, first edition, with Elements of Plane Geometry, first edition— 2 vols, 



8vo. in 1, old calf, 8s %d 1748-7 



14892 SIMPSON \_or SYMPSON] (William, m.d.) Hydrological Ess ayes : or, a Vindication of 

 Hydrologia Chymica : being a further Discovery of the SCARBROUGH Spaw, and of the right Use 

 thereof, and of the Sweet Spaw and Sulphur Well at Knarsbrough, with brief Account of 

 the Allom Works at Whitby, together with a Return to some Queries propounded by the in- 

 genious Dr Dan. Foot, concerning Mineral Waters. To which is annexed, an Answer to D» 

 Tunstal's Book, concerning the Scarbrough Spaw, with Appendix of the Anatomy of the 

 German Spaw, and, lastly. Observations on the Dissection of a Woman who died of the Jaundice, 

 all grounded upon Keason and Experiment, 12mo. old calf {sliqhily wormed and binding damaged), 

 12s 6^ B. Chiswell, 1670 



' The author seems to have tried the effect of mixing sulphur and nitre, and to have convinced himself that mineral 

 waters, hot springs, volcanoes, earthquakes. St. Elmo's fire, meteors, and even the occasional luminosity of the sea were 

 all due to mixtures of these two bodies with water or vapour.' — G. J. Symons, F.R.S. 



14893 SINCLAIR (George ; Prof. Philosophy, Glasgow) Ars Nova et MAGNA Gravitatis et 

 Levitatis, sive Dialogorum Philosophicorum Libri VI de Aeris vera ac reali Gravitate, etc , 

 quibus accessere de Instrumentis Hydragogicis, de Hygroscopic et Chronoscopio, seu Pendulo, 

 nee non Palladis Gymnasium, cum Indicibus ; tviih fine folding arms of George Mh Earl of 

 Winton, 2 plates, and woodcuts, sm. 4to. contemporary calf extra, with arms of the Due de 

 Montosier in gold on sides {binding rubbed and back very slightly damaged, otherwise a fine copy) ; 

 rare, £2. 2s Roterodami, 1669 



Containing an early account of an hygrometer and of the barometer ; also a description of the diving bell used by the 

 author in an attempt to raise the ship Florida, a relic of the Armada, which was wrecked off the Isle of Mull. The plate 

 of arms, which is contained in the above copy, is often missing. 



14894 SINDALL (Robert Walter) The Manufacture of Paper, with 58 illustrations, 8vo. cl., 4s 

 (p. 6s nett) 1908 



Including a valuable bibliography of works on cellulose and paper-making (pp. 253-72). 



14895 SINGER (George John) Elements of Electricity and Electro-Chemistry, with 4 plates, 

 8vo. boards, 10s 1814 



14896 Another Copy, hf. calf, 10s Qd 



'A work of considerable importance. ... He introduced several improvements, inventing, among other things, the 

 gold-leaf electrometer [actually invented by Abraham Bennet, f.r.s. {v. No. 6125 antey]. He gave courses of lectures on 

 electricity and kindred subjects. Among his auditors were Faraday and Sir Francis Ronalds.'— D. N. B. 



14897 SITZTJNGSBERICHTE der mathematisch-physikalischen Klasse der koniglich Bayer- 

 ischen Akademie der Wissenschaften ; from 1896 to 1910 (Bd. 26-40); with plates and other 

 illustrations, 15 vols. 8vo. sewn in parts, £1. Is (p. M. 77.40) Milncheti, 1896-1910 



14898 SKA.LKOVSKY (C.) Tableaux Statistiques de IIndustrie des Mines en Russie en 

 1868-76, roy. 8vo. (pp. 43), sewn, 2s St.- Peter sbourg [Petrograd], 1878 



14999 S]M[EATON(Jolin, F.R.S. ; builder of the third Eddystone Lighthouse) AccoviHT oisomeEx.VEni- 

 ments upon a Machine for Measuring the Way of a Ship at Sea, 4to. (pp. 16), sewn, 4s [s. I.], 1754 



14900 Account of an Observation of the Kight Ascension and Declination of Mercury 



out of the Meridian, near his greatest Elongation Sept. 1786, made with an Equatorial Micro- 

 meter, of his ow^n Invention and Workmanship ; with Investigation of a Method of allowing for 

 Refraction in such Observations, wtth folding plate, 4to. (pp. 26), sewn, 5s 1787 



Added is : An Account of an Experiment on Heat, by George Fordyce, m.d., f.r.s. (pp. 8). 



14901 : Considerations on the Intended Navigation betwixt Eorth and Clyde, occasione. 



by the Proceedings of the Proprietors at their last Meeting, and by the Reports of Messrs 

 Brindley, Yeoman, and Golborn, together with the Reviews of Mr. Smeaton, 4to. (pp. 11), 

 unbound, 4s dd [c. 1769] 



14902 — ; Description of a Pv^rometer, with Table of Experiments made therewith, with plate 



and folding table, 4to. (pp. 16), sewn, 5s [1754] 



' The measures taken by this instrument are determined by the contact of a piece of metal with the point of a micro- 

 meter screw.'— P. 3. 



