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



4214 SASSI (Luigi) Le Carte Fotografiche ; illustrated, 12mo. cZ., 2s Milano, 1899 



4215 RiCETTARio FOTOGRAFico, 2* Ediz. ampliata, 12mo. cL, Is ib., 1899 



4216 SAUNIER (Claudius) Le Temps : ses Divisions principales, ses Mesures et leurs Usages aux 

 Epoq[ues Ancieiines et Modernes ; illustrated, 12mo. seivn, 3s Qd 1858 



With interesting history of ancient and modern time-measuring instruments. 



4217 Traite d'HORLOGERiE MoDERNE, Theorique et Pratique ; with 21 folding plates {care- 



fully coloured), and 80 woodcuts, thick impl. 8vo. hf black morocco gilt {nice copy), 12s 6c? 



(p. F. 45. nett unbound) 1872 



a standard work on the subject. The plates are finely engraved to a large scale. 



4218 The Watchmaker's Hand-Book ; trans., revised, and enlarged by JULIEN Tripplin, 



Besan^on, and Edward Rigg, Royal Mint, with 14 plates and 27 woodcuts , cr. 8vo. cL, 4s 

 (p. 12s 6r/) 1881 



4219 SAUSSURE (Horace Benedict de, Gendoe) EssAis sur I'Hygrometrie. I. Description d'un 

 nouvel Hygrometre comparable. II. Theorie de I'hygrometrie. III. Th^orie de I'^vaporation. 

 IV. Application des theories pr(5c6dentes a quelques pli^nomfenes de la met^orologie, premiere 

 Edition ; with 2 coppciplates, 4to. sound copy in ola hf. calf, or, original paper covers, uncut 

 (RARE), £1. Is Neiichdtel, 1783 



4220 Reimpression ; with copperplate, 8vo. hf. bound {wanting one plate), 6s ib., 1783 



Containing the author's invention of the liair hygrometer. ' His ingenious and extensive researches, conducted with the 



simple hair hygrometer, entitle him to be considered the founder of hygroinetry.'— ^Zeo:. Buchan. 



' Un des plus beaux ouvrages dont la science se soit enrichie a la lin du XVIIIe siecle '.— Ciiiner. ' C'est lil que Saussure 

 fit connaitre son importante decouverte que I'air se dilate et devient speciliquement plus leger a mesure qu'il se charge 

 d'humidite. '—iJ(0(/r. Gen. 



4221 SAUSSURE (Nicolas Theodore de) ChExMISChe Untersuchungen iiber die Vegetation, 

 iibersetzt, mit einem Anhange und ZusJitzen, von F. S. VoiGT, 8vo. hf. calf, 5s Leipzig, 1805 



Containing his theory on the formation of vegetable mould, and the conversion of carbonic acid gas into organic com- 

 j)Ounds under the influence of water and light. 



4222 SAVAGE (E. B., a.m.i.c.e.) Sewerage and Sewage Disposal of a Small Town, with 5 

 folding plates {linen-mounted), 8vo. hf. calf neat, 3s Qd [189.5] 



4223 SAV^RIEN (Alexandre, inqinieur de la maritie) L'Art de Mesurer sur Mer le Sill AGE du 

 Vaisseau, avec une Idee de I'Etat d' Armament des Vaisseaux de France ; with 'ifne copperplates 

 by Francois, 8vo. old calf {rare), 12s Qd 1750 



Containing the description of two machines fur ascertaining a vessel's speed at sea, and advocating the formation of a 

 naval academy as well as a journal devoted to naval matters. 



4224 SAVERY (Thomas) Navigation Improv'd : or the Art of Rowing Ships of all Rates, in 

 Calms, with a more easy, swift and steady Motion than Oars can ; also, a Description of the 

 Engine that performs it ; and the Author s Answer to all Mr. Dummer's Objections that have 

 been made against it, with folding plate, and woodcuts, cr. 4to. hf parchment, uncut, £1. Is 



[1880, /s. reprint of^ J. Moxon, 1698 

 Only 10 copies of this reprint were issued. ' In 1696 he invented a contrivance for rowing ships in a calm by means of 

 two paddle-wheels, one at each side of the vessel, worked by a capstan placed between. William III. thought highly of 

 it, but, although Savery demonstrated its practicability by fitting it to a small yacht, official jealousy prevented its 

 adoption by the navy. He was obliged to content himself by publishing an account [the above] of his invention . . . 

 This treatise contained a vehement protest against the treatment accorded him in official circles.'— D. N. B. 



4225 SAWITSCH (Alexis, Univ. St. Petersburg) Abkiss der praktischen Astronomie, vorzuglich 

 in ihrer Anwendung auf geographische Ortsbestimmung, nach der 2. Original-Ausgabe, unter 

 Mitwirkung des Verfassers neu herausgegeben v. C. F. W. PETERS ; with 6 plates, 8vo. (pp. 864), 

 hf. morocco gilt {nice copy), 8s (p. M. 20. sewn) Leipzig, 1879 



Still a very valuable work, containing many original investigations. 



4226 SAWYER (Arthur Robert, f.g.s.) The Coldfields of Mashonaland, with 21 folding plates 

 {some coloured), roy. Svo. cl. {out of print), 3s 6d Manchester, 1894 



4227 SAWYER (John, f.i.a.) Automatic Arithmetic : a New System for Multiplication and 

 Division without Mental Labour and the Use of Logarithms, with automatic calculating 

 tables {linen-mounted), oblong 8vo. cl. {scarce), Is Qd [1878] 



' By the aid of the 1,7.09 figures in these tables, any number whatever can be multiplied or divided by any other number 

 which does not exceed 990,909,999.'— iVe/oce. 



4228 SAWYER (William Edward) Electric Lighting by Incandescence, and its Application 

 to Interior Illumination, with 96 woodcuts, 8vo. cl., 2s (p. 10s Qd) New York, 1881 



One of the earliest treatises on glow-lamx) lighting. 



4229 SCHEELE (Carl Wilhelm) Chemical Essays, trans, from the Transactions of the Academy 

 of Sciences at Stockholm, with Additions [by Thomas Beddoes, M.D.], Svo.Jine copy in old calf 

 gilt, newly and neatly rebacked (very rare), £1. 15s 1786 



The author's most important work, containing accounts of his discovery of hydrofluoric, tartaric, benzoic, arsenious, 

 molybdic, lactic, citric, malic, oxalic, gallic, and otlier acids. He also separated independently chlorine, baryta, oxygen, 

 glycerine, and sulphuretted hydrogen gas, obtained tlie salts of manganese, and showed how manganese colours glass. 

 His name is familiar in ' Scheele's green ', the pigment produced by arsenite of copper, whicli he first described, and for a 

 strong solution of prussic acid, which is well-known to the medical profession. He ended tragically, poisoned by prussic 

 acid fumes, which he tried to obtain pure from ferrocyanide of potassium. 



4230 Efterlemnade Bref och Anteckningar, utgifna af [Baron] A. E. Nordenskiold ; 



with statue-portrait, woodcuts, andfs. letters, impl. 8vo. sewn, 10s Stockholm, 1892 



Containing Scheele's hitherto unpublished correspondence, mostly in German, with Retzius, Gahn, Bergman, Hjelni, 

 and Lavoisier. Prefixed is a very complete bibliography. 



4231 Supplement au Traite Chimique de I'Air et du Feu, contenant un Tableau abreg^ des 



Nouvelles D^couvertes surlesdiverses Espfecesd'Air par J. G. Li^ionhardy, des Notes de Richard 

 Kirwan, et une Lettre du Dr. Priestley, traduit et augments par le Baron [P. F.] de 

 Dietrich, avec la Traduction des Experiences de M. Scheele sur la Quantite d'Air Pur qui se 

 trouve dans I'Atmosph^re, 12mo. contemporary sheep (rare), 12s Qd 1785 





