94 HENRY SOT HERAN & CO., 140, STRAND, W.C., AND 3?, PICCADILLY, W. 



1862 HEMMING (George Wirgman, QC.) ELEMENTARY TREATISE on the DIFFERENTIAL and 

 INTEGRAL CALCULUS, diagrams, 8vo. boards, 3s Cambridge, 1848 



1863 SECOND [LAST] EDITION, with Additions, diagrams, 8vo. cl., 5s 'ib., 1852 



Based on the method of limits. 



1864 HENDERSON (John) PRACTICAL ELECTRICITY and MAGNETISM, with 159 woodcuts, cr. 8vo. 

 cl., 3s (p. 65 Qd) 1898 



1863 HENNELL (Henry, Chemical Operator, Apothecaries' Hall) On the MUTUAL ACTION of SUL- 

 PHURIC ACID and ALCOHOL, and on the Nature of the Process by which ETHER is formed (Philos. 

 Trans.), 4to. (pp. 9), sewn, with author's inscription (scarce), 8s 6d 1828 



This important memoir first made known the synthetic formation of alcohol from oleftant gas and sulphuric acid a 

 process made use of by Berthelot in 1855 to make alcohol from coal gas. 



The author, whose biography is unaccountably excluded from D. N. B., was blown up in 1842 by one of the bombs prepared 

 by himself for use in the Afghan War. 



1866 HENBION (Denis) MEMOIRES MATHEMATIQUES recueilliset dressez en faveur de la NOBLESSE 

 FRANCOISE. I er Volume, auquel est traitte" de rArithmetique Militaire, CONSTRUCTION des 

 TABLES des SINUS, TOUCHANTES et COUPPANTES ; DOCTRINE des TRIANGLES RECTILIGNES ; 

 PRATIQUE du COMPAS de PROPORTION, etc. etc. ; with numerous diagrams, 12mo. old calf, with 

 bookplate of Philip 2nd Earl Stanhope, F.R.S. (RARE), 1. Is 1613 



FIRST EDITION of the author's first printed work. Vol. II was published in 1627, and a second edition of the above 

 volume in 19i!3. 



1867 - : Les -RECREATIONS MATHEMATIQUES avec 1'Examen de ses Prohlemes en Arithmetique, 

 Geometric, Mechanique, Cosmographie, Optique, Catoptrique, etc. Premierement reueu par 

 D. HENRION. Depuis par M. MYDORGE. Et tout nouvellement corrige et augrnente, 5 e Edition ; 

 with numerous woodcuts, 12rno. old sheep (binding slightly damaged), 12s Qd 1659 



1868 - - L' USAGE du COMPAS de PROPORTION, nouvellement revu, et augments' d'une seconde 

 Partie ; with plate, woodcuts and diagrams, 12rno. old sheep (jilt (one I. mended, otherwise a sound 

 copy], with bookplate of Philip 2nd Earl Stanhope, F.R.S., 12s Rouen, 1680 



1S69 HENRY (James), and Karel J. HORA: MODERN ELECTRICITY : a Practical Working Ency- 

 clopedia and Manual, 2 folding diagrams and 160 illustrations, sq. cr. 8vo. cl., 3s (p. 5s nett) 1905 



1870 HENRY (Lucien) TRAITE de GEODESIE TACHEOMETRIQUE, son Application au Trace des 

 Chemins de Per, au Leve des Parcellaires et du Cadastre : Theorie et Application des Coordonneew 

 Polaires et leur Conversion en CoordonneesRectangtilaires, 8vo., with ATLAS, containing 30 folding 

 plates, roy. 4to. 2 vols. hf. roan, 8s [1895] 



1871 HENRY (William, M.D., F.R.S.) ELEMENTS of EXPERIMENTAL CHEMISTRY, 9th Ed., with all 

 the recent Discoveries, 10 plates by Lowry, and diagrams, 2 vols. Svo. hf. calf (nice copy], 5s 1823 



The author was one of the most cultivated members of Manchester scientific society of his time (1774-1836). His 

 doctoral thesis ' De Acido Urico et Morbis a nimia ejus Secretione ortis ' should endear his memory to the polite world 

 of our unreticent age. 



1872 HENWOOD (William Jory, F.R.S.) The METALLIFEROUS DEPOSITS of CORNWALL and DEVON, 

 with Appendixes on Subterranean Temperature, the Electricity of Rocks and Veins, the Quantities 

 of Water in the Cornish Mines, and Mining Statistics, 12 plates and 114 tables, mostly folding, 

 very thick Svo. boards, uncut, 15s (p. 2. 2s) ' Penzance, 1843 



' The name Henwoodite has been bestowed in his honour on a hydrous phosphate of aluminium and copper.' D. N. B. 



1873 HERMANN (Jakob) PHORONOMIA, sive de VIRIBUS et MOTIBUS CORPORUM SOLIDORUM et 

 FLUIDORUM ; with engraved title byWandelaar,and \2folding plates, 4to. old calf, \2s Qd Amst.,niQ 



The author's most important work, in which he mentions an improved form of Amonton's air thermometer, which is not 

 effected by changes in the pressure of the air. He was a disciple of Jacques Bernoulli, and preceded Euler as professor of 

 mathematics at bt Petersburg. 



1874 HERO Alexandrinus : GEOMETRICORUM et STEREOMETRICORUM RELIQULE ; accedunt Didymi 

 Alexandrini Mensurae Marmorum et Anonymi Varise Collectiones ex Herone, Euclide, Gemino, 

 Proclo.Anatolioaliisque ; eLibb. MSS.ed.FRlDERicusHuLTSCH,!8vo.5e^;i,55 (p.M.8.) Berolini, 1864 



1875 - SPIRITALIUM LIBER, a FREDERICO COMMANDING ex Graeco, nuperinLatinumconversus ; 

 with numerous woodcuts, sm. 4to. old white vellum (A VERY TALL AND FINE COPY), 1. 5s Urbini, 1575 



1876 ANOTHER COPY, hf. calf (a few II. slightly stained, otherwise a sound and tall copy), 1. Is 



FIRST EDITION of the .first printed work of Hero of Alexandria, ' containing descriptions of about 100 small machines and 

 mechanical toys, many of which are very ingenious, including an account of a small stationary steam-engine, which is of 

 the form now known as Avery's patent. . . ." There is also an account of a double forcing pump to be used as a fire engine. 

 ... It is only recently that general attention has been directed to his discoveries, though Arago had alluded to them in 

 his eloye on Watt.' IF. W. R. Ball. 



1S77 - - De gli AUTOMATI, overo MACHINE SE MOVENTI Libri II, tradottidal Greco da BERNARD- 

 INO BALDI, Abbate di Guastalla, nuovamente ristampato et riccoretto ; with engraved title, and 

 numerous fine engravings on copper and wood, sni. 4to. old Italian vellum (a few II. slightly water- 

 stained, otherwise a sound and tall copy) ; rare, 15s Venetia, 1601 

 A translation of the A-vTo^ara, different from the first mentioned work, known as IT^eu/xan/ca, and like it containing 

 descriptions of machines and mechanical contrivances. The above edition is remarkable for the fine engravings it 

 contains. 



, et HERO CtesiMus v. MATHEMATICI VETERES, post. 



1378 - : MARTIN (Theodore Henri) RECHERCHES sur la VIE et les OUVRAGES d'HERON d'ALEX- 



. ANDRIE, et sur tous les Ouvrages Mathdmatiques Grecs, conserve's ou perdu s, public's on ine"dits, 



qui ont ete attribtie's h un Auteur nomine He"ron, 4to. (pp. 488), sewn, Is Qd Impr. Imperiale, 1854 



1870 HERSCHEL (Caroline [Lucretia]), MEMOIR and CORRESPONDENCE of, by MRS. JOHN 



HERSCHEL ; 2nd Ed., with 2 fine steel portraits (Miss Herschel, a>t. 92, and Sir William Hcrschel), 



and plate of the 40-foot Telescope, large post Svo. cl. (scarce), I0s Qd 1879 



The only biography of one of the most extraordinary characters in the history of science. Arrived in England to take 



over the household of her brother, she spent her time between household duties and ' sweeping ' the heavens, resulting in 



her discovery of 8 comets between 1780 and 1797. For her Catalogue of /ones of Sir W. Herschol's Star Clusters ;uid 



Ncliuhi* shf received the Gold Medal of the Astronomical Society. 



