HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 43, PICCADILLY, W. 461 



9131 HEMMER (Johann Jakob, s.j.) ANLEITUNG WETTERLEITER an alien Gattungen von GEBAU- 

 DEN auf di [sic] sicherste Art ANZULEGEN ; with copperplate, 8vo. unbound (rare), 15s Manheim, 1786 



The author ' was most successful in spreading the knowledge of lightning conductors' (R. Anderson), and the first to 

 point out the importance of earth connexion. 



AN INTERESTING AUTOGRAPH COLLECTION : 



9132 . - METEOROLOGICAL CORRESPONDENCE with the ABATE GIUSEPPE CALANDRELLI, from 

 1780 to 1787, consisting of eleven autograph letters from the former, with eleven 

 autograph copies of Calandrelli's answers, with other MSS. and printed matter (as under), 



4. 45 1780-7 



A very interesting correspondence in connexion with the foundation of a meteorological observatory at Rome (to which 



Calandrelli had been appointed as observer) by the Palatine Meteorological Society. 



Included are : ' Discorso del Ab. Paolo Frisi, nel Giornale di Pisa,' MS. on 12 pp. : 'Delle Influenze Meteorologiche della 



Luna: Difesa del Ab. Toaldo contro 1'opusculo del Ab. Frisi' ; a Reply to the foregoing work; MS. on 32 pp. : 'Capita 

 potiora, quae in conficiendis Instruments nostris observamus,' MS. ly Hemmer on 3 pp. : ' Questio ab Academia 

 Scientiarum Theodoro-Palatina in annum 1783 proposita,' MS. on 12 pp. : ' Descrizione di un Nuovo Termometro rid otto a 

 perfezione dal Sig. Giacomo Six, di Canterbury', with plate, etc., etc. 



9133 HENDERSON (George Gerald; Univ. Glasgow), and Matthew Archibald PARKER; 



Univ. Manitoba : INTRODUCTION to ANALYTICAL CHEMISTRY, with spectrum plate, and 2 dia- 

 grams, cr. 8vo. cl., 2s Qd (p. 5s) 1899 



9134 HENDERSON (John, Bengal Medical Establishment) DISSERTATION on the BIT NOBEN, or 

 FOZTID SALT of the HINDUS, the Sal Indus Antiquorum, commonly known in Hindostan by the 

 Name of Khallia Neemuk ; with Remarks on the Cheray ta of the Hindoos, the Kusseb Uzzereereh 

 of the Arabians, and the Calamus Aromaticus Antiquorum, with copperplate, 8vo. (pp. 40), sewn 

 (rare), 10s Qd 1803 



With interesting MS. note, signed F. WEBB, concerning pathological experiments with the medicine described. 



9135 HENDERSON (John, Municipal Technical School, Manchester) PRACTICAL ELECTRICITY and 

 MAGNETISM, with 159 woodcuts, cr. 8vo. cl., 2s Qd (p. 65 Qd) 1898 



9136 HENDERSON (Thomas; F.R.S., first Astronomer Royal Scots) On the PARALLAX of a 

 CENTAURI, 4to. (pp. 8), sewn, with inscr. to Sir Thomas Maclean, F.R.S., 3s Qd [Edinburgh], 1839 



Important as containing the author's discovery of the first authentic case of annual parallax in a fixed star. 



9137 - The PARALLAX of a CENTAURI, deduced from MR. MACLEAR'S OBSERVATIONS at the 

 Cape of Good Hope, in 1839 and 1840, 4to. (pp. 44), sewn, 2s Qd [t'6.] , 1842 



9138 HENLY (William, F.R.S.) EXPERIMENTS and OBSERVATIONS in ELECTRICITY, with Postscript, 

 containing a Variety of New Experiments and Observations, particularly an Enquiry into the 

 CAUSE of the ELECTRICITY of BODIES, and the CONSTITUTION of the ELECTRIC MATTER ITSELF, 

 with Notes tending to confirm and illustrate the Opinions advanced, folding plate, 4to. (pp. 63), 

 sewn (rare), 10s Qd 1777 



The author, a licendraper by trade, was the inventor of a quadrant electrometer and the general discharger facts 

 unknown to his biographer in D. N. B. 



9139 HENNAH (Richard, pr.) A SUCCINCT ACCOUNT of the LIME ROCKS of PLYMOUTH, with 

 11 plates, illustrating some of the most remarkable of the Animal Remains found in them, roy. 8vo. 

 (?) LARGE PAPER ; hf. calf, with Sandhurst College bookplate and auto, of Adml. William 

 Bedford (1764?- 1827), 6s Qd Plymouth [c. 1820] 



9140 HENNELL (Henry, F.R.S., Chemical Operator, Apothecaries' Hall) On the MUTUAL ACTION of 

 SULPHURIC ACID and ALCOHOL, and on the Nature of the Process by which ETHER is formed, 

 4to. (pp. 9), sewn, with author's inscr. (scarce), Is Qd 1828 



This important memoir first made known the synthetic formation of alcohol from olefiant 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 his own bombs, 

 prepared by him for use in the Afghan War. 



9141 HENRICI (Olaus ; F.R.S.) SKELETON STRUCTURES : especially in their Application to the 

 Building of Steel and Iron Bridges, with 4 folding plates (linen-mounted), and 18 diagrams ; 

 with 144 pp. of writing paper bound in, 8vo. hf. morocco gilt (o. p.), 5s (p. 16s in cl.) 1866 



9142 - , and G. C. TURNER : VECTORS and ROTORS, with Applications, with 155 diagrams, 

 cr. 8vo. cl., 2s Qd (p. 4s Qd) [1903] 



9143 HENRION (Denis) L'UsAGE du COMPAS de PROPORTION, quatriesme Edition, reueue, 

 corrige*e, & de beaucoup augmented ; with woodcuts and diagrams, 12mo. old vellum, 1. Is 1631 



Added is a CONTEMPORARY MANUSCRIPT entitled ' Declaration des Divisions faictes sur les deux reigles Pantometrice et 

 leurs operations, par les propositions suyvantes des present liuret," ivith tinted illustrations (pp. 16). 



9144 HENRY Joseph ; Director Smithsonian Institution) CONTRIBUTIONS to ELECTRICITY and 

 MAGNETISM : No. I : DESCRIPTION of a GALVANIC BATTERY for producing ELECTRICITY of 

 DIFFERENT DENSITIES, with copperplate, 4to. (pp. 6), sewn, with author's inscr. as below, 

 7s Qd Philadelphia, 1835 



' To Edward Solly Esq. with the Respts. of the author.' 



The first plunge battery ever devised, consisting of 88 cells arranged in sets of 11 each. 



9145 -- : No. II : On the INFLUENCE of a SPIRAL CONDUCTOR in INCREASING the 

 INTENSITY of ELECTRICITY from a GALVANIC ARRANGEMENT of a SINGLE PAIR, 4to. (pp. 9), 

 sewn, with author's inscr. as below, 8s Qd ib., 1835 



' To Edward Solly Esq. with the Respects of J. HENRY.' 



Containing the author's discovery independently of Faradayi-of magneto-electric induction. He was eponymized in 

 electrical science to denote the unit of induction. 



9146 - , A MEMORIAL of, published by Order of Congress, with steel portrait, roy. 8vo. cl., 8s Qd 



Washington, 1880 



Containing notices of his meteorological work (including his inauguration of meteorological observations in the 

 United States) by W. B. TAYLOR and PROF. SIMON NEWCOMB. 



9147 HENS MANS (P. J.) MEMOIRE sur le PROPORTION NEMENT CHIMIQUE PESE et MESURE des 

 CORPS ; with folding table, 12mo. sewn, 4s Louvain, 1824 



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