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



RUTHERFORD (William, f.r.a.s.)— v. Mathematician {No. 2889), and Mathematics 

 {No. 2891-2), ante, 



4151 RYAN (Matthew, of Tipperary) The Celebrated Theory of Parallels: Demonstration of 

 Euclid L Axiom 12, with a partial Refutation of Sir W. Hamilton's Philosophy of the Uncon- 

 ditioned or Infinite, diagrams, 8vo. (p. 16), sewn, 2s Washington, 1866 



4152 RYFF (Peter; Univ. Basel) Qu^STiONES Geometric^ in Euclidis et P. Rami Srocxn'waij/, 

 quibus Geod^siam adjecimus per usum Radii Geometric! ; ivith numerous woodcuts and diagrams, 

 4to. boards, uncut {browned and a few II. slightly wormed), Qs Francofurti, 1621 



4153 Editio Altera, cui accessit Commentatio Optica, sive brevis Tractatio de Perspectiva 



Communi ; with plates, woodcuts, and diagrams, 12mo. old calf, neatly rebacked, with bookplate of 

 Philip '2nd Earl Stanhope, F.B.S., Is Qd Oxoniie, 1665 



The above is the only edition containing the author's treatise on perspective. 



4154 RYLAND (John [Collett, Baptist mi7iister], Northampton), [and James FERGUSON, 

 F.R.s.)] : Easy Introduction to Mechanics, Geometry, Plane Trigonometry, Measuring 

 Heights and Distances, Optics, and Astronomy ; and Essay on the Advancement of Learning 

 by various Modes of Recreation, \2 folding plates, 12mo. contemporary calf, 10s Qd 



E. and C. Dilly, 1768 

 ' It is his [Ryland's] chief merit to have done more perhaps than any man of his time to promote polite learning among 

 the baptist and orthodox dissenters.'— D. N. B. 



4155 RZIHA (Eduard) Die Theorie der Minen basirt auf die Wellenbewegung in concentrischen 

 Kugelschichten ; with ^folding plates, and diagrams, 8vo. half calf {title stamped), os 



als MS. gedruckt, Lembcrg, 1866 



4156 RZIHA (Franz V.) Lehrbuch der gesammten Tunnelbaukunst ; with hundreds of wood- 

 cuts, 2 vols. 4to. sewn, 16s (p. M. 54.) Berlin, 1867-72 



Important as the first German systematic treatise on tunnelling, 



4157 SABINE (General Sir Edward, r.a., p.r.s.) Account of Experiments to determine 

 Ihe Figure of the Earth, by means of the Pendulum vibrating Seconds in Different Latitudes ; 

 as -well as on various other Subjects of Philosophical Inquiry, 4to. hf calf, with AUTHOR'S INSCR. 

 {see below), and Sandhurst College bookplate (scarce), £1. Is 



printed at the expense of the Board of Longitude, 1825 

 •John Narrien Esq^e, [f.r.s.] with many thanks for his valuable critical remarks on the Work. NovK 16th 1825.'— 



Inscr. on title. 



'An enduring monument of his indefatigable industry, his spirit of inquiry, and wide range of observation. The work 



was honoured by the award to him of the Lalande gold medal of the Institute of France in 1826.'— D. N. B. 

 The facts contained in the work enabled Gauss to lay down his theory of terrestrial magnetism. 



4158 A Comparison of Barometrical Measurement, with the Trigonometrical Deter- 

 mination of a Height at Spitzbergen, with 1 plates, 4to. (pp. 20), sewn, 5s Qd 1824 



'To Peter Barlow Esq'e. [f.r.s.] with Lieu*. Hr. Foster's [f.r.s.] sincere [regards].'— J/iscr. o?i title. 



4159 Observations at the Magnetical and Meteorological Observatory at the Cape of 



Good Hope : Vol. I : Magnetical Observations, 1841-6, with Abstracts of the Observations, 

 1841 -50, /oWiM^r charts, impl. 4to. cl., uncut, 10s (p. £2. 2^) 1851 



4160 at HoBARTON, in Van Diemen Island, and by the Antarctic Naval Expedi- 

 tion, Vols. I-II : 1841-5, with Abstracts of the Observations, 1841-50, charts, 2 vols. impl. 4to. cl., 

 uncut, lis 6d (p. £5. 56) 1850-2 



4161 at St. Helena, Vol. 1 : 1840-3, with Abstracts of the Observations, 1840-5, folding 



charts, impl. 4to. cl., uncut, 9s (p. £2. 2*) 1847 



The detachment of R. A. engaged were lodged in Lougwood House. 

 presentation copy to F.-M. sir J. F. BURGOYNE : 



4162 at Toronto in Canada, Vols. I-II : 1840-5, with Abstracts of the Observations to 



1852, plate and folding charts, 2 vols. impl. 4to. cl., uncut, 18s 6d (p. £5. 5^) 1845-53 



4163 Vol. I only: 1840-2, plate and folding charts, impl. 4to. hf calf, with inscr. to Prof 



Narrien, F.E.S., 9s (p. £2. 12s 6d) 1845 



4164 Observations on Days of Unusual Magnetic Disturbance, made at the British 



Colonial Maj^netic Observatories, Vol. I [all published] : 1840-4, impl. 4to. cl., uncut, 10s 1851 



4165 Part I only: 1840-1, impl. 4to. cl., 5s 1843 



4166 Another Copy, hf. calf, with Sandhurst College bookplate, 5s 



' It is to this distinguished observer that we are chiefly indebted for ths organization of the vast system of observatories 

 which have been established in later times, and for the complete discussion of the observations which they have afforded, 

 and which have totally changed the aspect of the science of magnetism'.— Demi Peacock, F.R.S. 



The observations at Toronto and Hobart are especially valuable as having borne out John Lamont's discovery of the 

 periodicity of magnetic variation. 



The following is a complete list of the observations published under Sir Edward Sabine's superintendence (and contain- 

 ing his valuable introductions) : Toronto, 3 v., St. Helena, 2 v., Cape of Good Hope, 2 v., and Hobart Town, 3 v. 



4167 SACCHER.I (Girolamo, s.J.) Quj]:sita Geometrica, a Comite Rugerio de Vigintimiliis omnibus 

 proposita, soluta ; with 8 2Jlates, 4to. seivn, 6s Qd Mediolani, 1693 



The author anticipated Lobatchewsky's doctrine of the parallel angle. 



4168 ST.-JTJLIEN (Antoine de; Chevalier de Malte) La Forge de VULCAIN, ou I'APPAREIL des 

 Machines de Guerre: Traite curieux dans lequel on fait voir comme en racourci quels sont les 

 Instruments Militaires, leur forme, matiere, composition, fin, appareil et execution, et les eflfets 

 surprenans qu'ils produisent, etc. ; with woodcut plates, sm. 8vo. (pp. 144), sewn {wanting one or 

 two II. at end), 4s 6d La Haye, 1606 [sic ; rede 1706} 



4169 ST.-ROBERT (Paul de) Pbincipes de Thermodynamique ; with diagrams, roy. 8vo. hf calf 

 {out of print), 5s Turin, 1865 



Largely matliematical, and based on the researches of Lord Kelvin, Rankine, and Clausius. It contains an important 

 chapter ; Mouvement des projectiles dans les armes a feu. 



