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



803 CLAKE (Martin, r.R.s.) The Motion of Fluids, Natural and Artihcial, in ])aiticular of the 

 Air and Water, 2nd Ed., icith 8 plates, 8vo. old calf {fine copy), with bookplate of Philip 2nd 

 Earl Stanhope, 5s 1737 



804 CLARK [sice CLERKE] (Gilbert, pr.) Ougiitredus Explicatus, sive Commentarius in ejus 

 Claveni Matheniaticam, cum Planetarum Observationilms et Horologiorum [Solarium]^ 

 CoNSTRUCTiONE ; ivith 2 folding plates, 2 vols. 12mo. in 1, old calf [nice copii), icith bookplate of 

 Philip 2nd Earl Stanhope, Is Gd " Londini, 1682 



The author mentions in this work his invention of Iho spct-dial. 



805 CLARK (Josiah Latimer, f.r.s. ; telegraph cable engineer) Elementary Treatise on 

 Electrical Measurement, front., chart, and 41 ivoodcuts', post 8vo. cL, 2s 1868 



800 , and Robert SABINE: Electrical Tables and Formula for Telegraph Inspectors 



and Operators, ivoodcnts, post 8vo. cl., 2s 6d 1871 



Althoufjh out of O.ate, both woiks are of some historical value. 



807 CLARK (Samuel) Easy Introduction to the Theory and Pracmce of Mechanics, containino- 

 a Variety of Curious and Important Problems investi^iated with ^the greatest Facility by the 

 Application of one General Property of the Center of Gravity, without having Resource to the 

 Composition and Resolution of Forces, diagrams, 4to. old calf, ivith auto. (1790) and bookplate of 

 Thomas Leybourn {mathematician) ; rare, 10s 1764 



80S CLARKE (Col. AleTi. Ross, r.e., f.r.s.) Geodesy, with Q4: illustrations, large 8vo. cL, vncut 

 (FRESH copy), £1. OS Clarendon Press, Oxford, 1880 



The best modern text-book on the subject in English. It is out of print and now verv scarce. 



809 CLARKE (Frank Wiggles worth) The Constants of Nature, Part V : PvECALCULATION of 

 the Atomic Weights, new Ed., enlarged, roy. 8vo. half crushed green Levant morocco, uncvt, 

 t. e. g. (fine copy), 156^ IVashinjfon, 1897 



810 CLARKE (John Sutherland) The Properties of the Parabola proved geometrically, with a 

 Collection of Problems, diagrams, 8vo. sewn, 2s 6d Cambridge, 1852 



811 CLAUSIUS (Rudolph) Tlie Mechanical Theory of Heat, with its Applications to the 

 Steam-Engine, and to the Physical Properties of Bodies, ed. by Thomas Archer Hirst, f.r.s., 

 with Intro, by John Tyndall, f.r.s., woodcuts, 8vo. cl. {fresh copy), scarce, 8s 1867 



812 Another Copy, calf neat {damp on title), Ss 



First English edition of this epoch-making work, vhich lirst placed therm odynaniics on a scitntilic basis. It was 

 translated by \arious hand.s from ' Abhandlungen liter die mechanischc Wiirmetheorie ' (18G4-7). 



813 The Mechanical Theory of Heat, trans, by Walter Kaleigh Broavne, with wood- 

 cuts, post 8vo. tiew hf brown calf gilt, t. e. g. (SCARCE), 12.? 6r/ 1879 



a translation of the second and greatly' revised edition of the Ahhandlunacn, with 3 Appendixes by the translator. 

 814 CLAVIUS (Christophorus, Bambergensis, S.J.) Opera Mathematica V Tomis distributa, ab 

 Auctore nunc denuo correcta, et plurimis Locis aucta; with engraved title containing portrait, and 

 numerous woodcids and diagrams, 5 vols, folio, old vellum {badly browned) ; rare, £3. 3^ 



Moguntia', 1612 



I. In Euclidem et in Theodosium cnmmentarii ; de siiiibus et lineis tangentibns et secantibus ; triangula rectilinea et 

 sidiiprira. II. Geoinetria practica ; aritiimetica practica ; algebra. III. In sphtEraniJoa.de Hacro Bosco commentarius ; 

 astrohbium. IV. Gnomonices libri VIII ; fabrica et nsus insttumenti horologiorum ; horologiorum nova desciiptio. V. 

 Romani calendarii a Gregorio XIII. restitutio; Jos. Hcaligeti elenchus et castigatio cal. gregor. castigata ; responsio ad 

 calumnias Jos. Scaligeri ; confutatio calendarii GeorgiGermanni. 



Clavius, 'the Euclid of the XVI. Century', is chiefly known by having, at the instance of Pope Gregory XIII., Avorked 

 out the improvements in the Julian calendar which resulted in the Gregorian calendiir. 



81o Aritmetica Prattica, tradotta di Lorenzo Castellano, revista dal med. P. Claviocon 



alcune aggiunte, 12mo. old limp vellum, 8s 6d Venetia, 1671 



' Perhaps there are more extensive examples of the square root worked by the old method in this treatise than would 

 easily be found elsewhere.' — Prof, dc Morgan. 



Commentaria in Euclidem (1G12)-v. Euclides, post. 



81G Compendium brevissimum Horologiorum Horizontalium ac Declinantium : Tabulae 



Altitudinum Solis pro HORIS Astronomicis in Signorum Initiis, ad omnes Gradus Altitudinis 

 Poli Borealis : Tabul.e ASTRONOMlCiEad HOROLOGIORUM Constructionem maximeutiles, et Not<e 

 in Novam Horologiorum Descriptionem — 3 vols. cr. 4to. in one, with icoodcuts and diagrams; 

 old limp vellum (rare), £1. Is Ronuv, 1603-5 



817 Gnomices Libri VIII, in quilms non solum HOROLOGIORUM SOLARIUM, sed etiam aliaruni 



(juoque Kerum, qu.'c ex Gnomonis Umbra cognosci possunt, Descriptiones geometrice demon- 

 strantur, editio princeps ; with engraved title, icoodcuts and diagrams, folio, old parchment {top 

 of back damaged, and title and a few II. stained) ; rare, £\. 5s ibidem, 1581 



818 Romani Calendarii a GrI':gorio XIII. P.M. restituti Explicatio, dementis YIII. P.M. 



jussu edita; accessit Confutatio eorum, qui Calendarium alitor instaurandum contenderunt, editio 

 princeps, folio, contemporary piressed jng&kin on oaken boards, sides covered with floral design, 

 clasps {back slightly damaged, and a munber of II. water-stained) ; RARE, £1. \0s ibidem, 1603 



First edition of the official explanation of the Gregcn'ian calendar, largely the result of the author's labours. 



819 In Spilf:ram Joannis de Sacro Bosco Commentarius, nunc quarto ab ipso Auctore 



recognitus, et plerisque in locis locupletatus ; icith numerous woodcuts and diagrams, sm. 4to. old 

 limp vellum, \2s Qd ' S. Gervasii, 1602 



820 CLERK (John, of Eld in, F.R.S. Edin.) Essay on Naval Tactics, Systematical and Historical, 

 Parts I-IV (all pub.), first complete edition, with 52 plates {many folding), 2 v<ds. 4to. original 

 boards, uncut, with auto. o/'JoHN Clerk, Advocate' [Lord Eldin], the author's Son (rare), 

 £1. 155 1790-7 



One of the most interesting works on (he subject, which gave rise to a prolonged controversy on its merits, it having, 

 been claimed th.at the author's new proposal of a manceuvre for ' breaking the enemy's line' had been adopted by Lord 

 Rodney at the battle off Dominica, April 12, 1782, and had largely contnbute<l towards the victory. Prof. Laughtou 

 howe\er has since shown that there is very little, if any, evidence for this assertion. 



