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



14395 BOGET (Peter Mark, m.d., f.r.s. ; author of ' Thesaurus of English Words and Phrases'), 

 Description of the New Sliding Rule of Involution invented by, with Instructions for 

 LTsing it, made by John Rooker, 8vo. (pp. 11), sewn (scarce), 7s 6d 1828 



The inventor's own copy, with a few MS. corrections. ' In 1814 he had contrived a slidin<? rule, so graduated as to be a 

 measure of the powers of numbers, in tlie same manner as the scale of Gunter was a measure of their ratios. It is a logo- 

 logarithmic rule, the slide of which is the common logarithmic scale, while the fixed line is graduated on the logarithm of 

 logarithms.'— i>. .V. B. 



J4396 r ] Galvanism (Encyclopaedia Metropolitan a), ivith plate, 4to. (pp. 52), unbound, ^s 6d 



[1826] 



14397 E.OHAXJLT (Jacques) Physica, Latine vertit, recensuit et Adnotationibus ex illustrissimi 

 IsAACi Newtoni Philosophia maximam Partem haustis, amplificavitet ornavit Samuel Clarke, 

 S.T.P. ; Editio III., in qua Annotationes sunt dimidifi Parte auctiores; with 27 folding plates, 8vo. 

 old coif gilt {one Joint cracked, otherwise a sound copy), 10s Londini, 1710 



14398 Editio Quarta ; tvith 27 folding plates. 8vo. old calf, with Chippendale bookplate of 



[Sir^ John Cullum [Bart, pr., F.R.S., F.S.A.], I0s6d ibidem, 1718 



14399 System of Natural Philosophy, with Dr. Samuel Clarke's Notes, taken mostly out 



of Sir I. Newton's Philosophy, with Additions, done into English by John Clarke, Dean of 

 Sarum, 2nd Edition, with 27 folding plates, 2 vols. 8vo. old panelled calf {joints cracked), rare, 

 145 1729-8 



14400 Another Copy, contemporary panelled calf {one joint cracked), with fine bookplate of 



John Baker Holroyd, first Earl of Sheffield, friend of Gibbon (1735-1821), 16s 



This work long formed the text-book of physics at Camb'idge. The translation itself (by the Arianising Rector of St. 

 James's, Westminster), is of importance in the history of science as having been instrumental (although still wholly base<l 

 on the Cartesian philosophy) in introducing the Newtonian system there, by means of .judicious marginal notes in which 

 the translator exposed tue lallacies of the Cartesian system, "then still all-powerful at Cambridge University. 



114401 Traite de Physique, premiere edition ; with 2 copperplates, and numerous woodcuts 



and diagrams, 2 vols.4to. in 1, old calf gilt [back slightly damaged), rare, £1. 10s C. Savreux,lG7l 



All ediiions of this work are now rare. 



' II construisait avec trois tubes de verre une especede barometre, connu au.jourd'hui sous le nom de chamb-ie deRohault. 

 II deinoiitrait, par les diflerentes refractions de la lumiere, q';e lescouleurs n'ctaient que des modifications decettematiere. 

 Ses experiences sur laimant furent aussi tres-remarquables.'— /J^o.qrr. Gen. 



The author was a whole-hearted supporter of the physical doctrines of Descartes. The above work, which went 

 through many editions, and was translated into most European languages, was jmr excellence the physical text-book of 

 Cartesian philosophy. 



14402 [ ] Treatise of Mechanicks, or the Science of the Effects of Powers or Moving Forces, 



as apply'd to Machines, demonstrated from its first Principles, translated by Thomas Watts, with 

 1 folding plates, 8vo. old panelled calf {back slightly damaged) ; rare, 10s Qd 1716 



' In this Translation are inserted Particular References to the several Propositions in Euclid on which the Demonstrations 

 are built : with considerable Additions, whereby the Whole is more compleat and Universal, and particularly the Rising 

 and Falling of the Quicksilver in the Weather-Glass explained and accounted for.' 



14403 KOHLAND (Paul) Der kolloide und kristalloide Zustand der Materie, roy. 8vo. 

 (pp.50), sew)i. Is Stuttgart, 1910 



14404 KOHR (Moritz v., ivissenschaftltcher Mitarbeiter der optischen Werksidtte von Carl Zeiss in 

 Jena) Theorie und Geschichte des photographischen Objektivs, nach Qiiellen bearbeitet ; 

 with 4 folding plates, and 148 other illustrations, large 8vo. cL, 7s 6c? (p. M. 12 sewn) Berlin, 1899 



The only authoritative work on the subject, and of great historical importance. Pp. 399-435 cojnprise a valuable 

 bibliography. 



34405 BOHBS (J. H., Jesus Coll., Cantab.) On the Oscillations of a Suspension Chain, 4to. 



(pp. 20), sewn, 3s Zd [Cambridge, 1851] 



' Determining the tension and other circumstances of motion at any point of a disturbed chain ; principally with a view 



to exhibit the causes of fracture by vibration in suspsnsion bridge", and to suggest means for obviating as much as possible 



the danger arising from such vibrations.'— P. 1. 



14406 ROITI (Antonio) Sulla Propagazione del SuoNO nella odierna Teoria degli Aeriformi, 

 4to. (pp. 15), sewn, 2s Firenze, 1877] 



14407 ROLFE (George William, Mass. Inst. Technology) The Polariscope in the Chemical 

 Laboratory : an Introduction to Polariinetry and related Methods, with 38 luoodcuts, post 8vo. 

 c/., 5s (p. 89 nett) IJew York, 1905 



14408 HOLLAND (Camille) Note sur I'Application de la Locomotive a Vapeur sans Foyer 

 au Transport des Wagons dans I'lnterieur des Mines de Charbon ; with folding plate, roy. 8vo. 

 (pp. 10), sewn. Is Qd [Liege,'] 1889 



14409 ROLLAND (Eugene) Memoire sur I'Etablissement des Regulateurs de la Vitesse ; 

 with folding plate, 4to. (pp. 56), sewn, 4s [1870] 



' Renferinant une excellente etude de la question des regulateurs isochrones, et faisant connaitre plusieurs solutions 

 nouveiles, a la fois nette et simple, de cette interessante question.'— i)eZf(('?ia(/. 



14410 ROLLER (Frank W., m.a.i.e.e.) Electric and Magnetic Measurements and Measuring 

 instruments, with 312 woodcuts and diagrams, large 8vo. cl, 9s (p. 15s nett) New York, 1907 



14411 ROLLET (Augustin) Memoire sur la Meunerie, la Boulangerie, et la Conservation des 

 ijRAiNS et des Farines, contenant une Description complete des Procedes, Machines et Appareils 

 appliques jusqu'a nos Jours, et plus particulierement dans les diverses Usines de France, i'Angle- 

 terre, d Irlande, de Belgique, de Hollande, etc., avec Considerations sur le Commerce des B16s en 

 Jiurope ; with 16 folding plates, 4to. hf calf {Atlas wanting), 6s 1846 



14412 ROMBXJRGH (P. van ; Univ. Utrecht) On the Crystallised Constituent of the Essential 

 ^1A^Q IvAEMPFERiA Galanga L , impl. 8vo. (pp. 4), sewn. Is Gd [Amsterdam,^ 190O 



• , c ? ^^^ Nitration of Dimethylaniline dissolved in Concentrated Sulphuric Acid, 

 impl. 8vo. (pp. 3), setvn, Is 6rf [ibidem,] 1900 



