HFARY SOTHERAN it CO., 140, STRAND, W.C., AND 37, PICCADILLY, W. 

 1801 ANOTHER COPY, new hf. brown calf gilt, 12s 



A work of well-known merit, including chapters on Accumulat 

 awarded the Royal Society's Copley Medal for his researches on the laws of electricity of high tension, and the Bakerian prize, 



A work of well-known merit, including chapters on Accumulators, and on Electrical Manipulation. The author was 

 rarded the Royal Society's Copley Medal for his researches on the laws of electricity of high tensio 

 for his ' Inquiries concerning the Elementary Laws of Electricity'. 



1S02 HARTING (Hans) liber ALQEBRAISCIIE und NUMEBISCIIE BERECHNUNG der MIKROSKOP- 

 OBJECTIVE GEBINOER APERTUR ; with diagrams, roy. 8vo. (pp. 32), sewn, Is Qd Wien, 1898 



1803 HARTLEY (F. W.) The GAS ANALYST'S MANUAL [including PHOTOMETRY], woodcuts, post 

 Svo. cl. (out of print], 3s Qd 1879 



1804 HARTNER (Friedrich), e Josef WAST LEB : MANUALS di GKODESIA INFERIORS ; Tra- 

 dnzione italiana di PASQUALE FANTASIA; with 2 plates and numerous woodcuts, thick roy. Svo. 

 hf. calf, 5s Napoli, 1894 



1805 HASELDEN (Thomas, Teacher of Mathematics in the Royal Navy) The SEAMAN'S DAILY 

 ASSISTANT : a Short, Easy, and Plain METHOD of KEEPING a JOURNAL at SEA, with Rules 

 shewing the Allowances for Leeway, Variation, Heave of the Sea, Set of Currents, etc., and Tables 

 for the Seaman's Use, sm. 4to. contemporary calf (a few pp. water-stained or inked) ; RARE, 15s 1784 



Requiring only the most elementary knowledge of arithmetic to be understood. 



1806 HASKOLL (W. Davis, C.E.) RAILWAY CONSTRUCTION, with Treatise on Taking Borings, etc. 

 etc., BOTH SERIES, with very numerous folding plates and woodcuts, 4 vols. impl. Svo. cl., 8s Qd 

 (p. 5. 15s Qd) [1863J-4 



1807 HATCH (Frederick EL), and J. A. CHALMERS : The GOLD MINES of the II AND : a Descrip- 

 tion of the Mining Industry of Witwatersrand, with 14 plates, 80 smaller illustrations, and 1 folding 

 plans and maps, impl. Svo. cl., 8s Qd (p. 17* nett) 1895 



1808 HATTON (Edward, Philomercat.) ARITHMETICS ; or, the Ground of Aris, originally composed 

 by DK. RECORD, and others, and now new r Methodized, much Improved, and added a New 

 TREATISE of DECIMALS, Tables of Simple and Compound Interest, and the easiest Method of 

 Extracting the SQUARE and CUBE-ROOTS of NUMBERS, with fine portrait by R. White, and dia- 

 grams, 4to. FINE COPY in contemporary brown calf, blind-tooled sides (rare], 1. Is 1699 



' The last edition of Recorde's Grounde ofArtes I knoAV of is that by Ed\v. Hatton, London, 16'.'f>, 4to. ; it has an additional 

 book called ' Decimals made easie '.' Prof, de Morgan. 



1809 MATHEMATICAL MANUAL : or, DELIGHTFUL ASSOCIATE, with diagrams, Svo. f tie copy in 



contemporary calf, ivith bookplate of Philip 2nd Earl Stanhope, F.R.S., 5s J728 



Containing a chapter on ' Mysterious Curiosities in Numbers, or Numerical Novelties.' 



1810 HAUGHTON (Samuel, pr., T.C.D. ; M.D., F.R.S.) Six LECTURES on PHYSICAL GEOGRAPHY, 

 illustrated, Svo. cl., 6s (p. 12* 60?) Dublin, 1880 



' In physical geology Haughton studied the effects on the position of the earth's axis of elevations and depressions 

 caused by geological changes, with the resulting changes of climate. . . . He undertook a laborious series of calculations 

 on solar radiation, the object of which was to determine the effects on terrestrial climates of alterations in the tempera- 

 ture of the sun and in the constitution of the atmosphere.' D. N. B. 



1811 HAUKSBEE [the elder] (Francis, F.R.S.) PHYSICO-MECHANICAL EXPERIMENTS on Various 

 Subjects, containing an Account of the SURPRIZING PHENOMENA touching LIGHT and ELEC- 

 TRICITY, producible by the ATTRITION of BODIES, with many other Remarkable Appearances, not 

 before observed, with the Explanations of all the Machines, and other APPARATUS us'd in the 

 Experiments, with 8 fine folding copperplates, cr. 4to. sound tall copy in contemporary panelled 

 rff(VEBY RARE), with inscr. as' below, 2. 2,? 1709 



'Ex dono D: D: M: Roberti Simsoni Prof: Math: [1637-1768, editor of Eudld and restorer of ApoUonius'] in 

 academia Glasgouana'. Inscr. on flyleaf. 



One of the most important early works on electricity, containing a description of the FIRST ELECTRICAL MACHINE 

 (invented by the author), consisting of 'a pretty large glass cylinder., turned by a winch and rubbed by the hand', as 

 well as descriptions and illustrations of an improved air-pump of his invention, founded on his discovery of the 'lateral 

 communication of motion in air." 



In his preface he mentions that ' the Nature and Laws of Electrical Attractions have not yet been much consider'd by 

 Any '. In the above work and his contributions to the Royal Society lie carried further the tentative observations of 

 Dr. Gilbert and Boyle on electricity, and by his experiments may be said to have laid the foundation of that science. He 

 certainly \vas the first to discover the electric ."park. He also determined the relative weight of water and air, and was 

 the tirst to use glass in the electrical machine. 



1812 HAUPT (Hermann; Gen. Manager P. R. R.) MILITARY BRIDGES, with Suggestions of New 

 Expedients and Constructions for Crossing Streams and Chasms ; also Designs for TEESTLE and 

 TRUSS BRIDGES for MILITARY RAILROADS, with 69 lithographs (many full-page}, Svo. hf. calf 

 (rubbed) ; out of print, Is 6d (p. 1. 10s) New York, 1864 



A valuable work, the fruit of the author's experience with the Northern Army during the Civil War. 



1813 - - TUNNELLING by MACHINERY : Perforators and Plans of Operations in Mining and Tun- 

 neling of his Device, 4 folding plates, Svo. sewn, 3s Qd Philadelphia, 1867 



1814 HAUSBRAND (E.) Die WIRKUNGSWEISE der RECTIFICIR- und DESTILLIR-APPARATE, mit 

 Hiilfe einfacher mathematischer Betrachtungen ; illustrated, Svo. sewn, 2s Qd (p. M. 6.) Berlin, 1893 



1815 HAUVEL (Charles) NOTICE sur le SURCHAUFFEUR DIFFERENTIEL, roy. Svo. sewn (scarce], 5s 



Clermont (Oise), 1880 



1816 HATJY (Rene Just, de V Academic ; Chanoine de Paris] EXPOSITION RAISONNEE de la 

 THEORIE de TELECTRICITE et du MAGNETISMS, d'apres les Principes de M. .EPINUS, ties Acade"- 

 mies de Petersbourg, de Turin, etc.; with 4 plates, Svo. old leather, or, sewn, uncut, 8s 6d 1787 



2EPINUS was the natural philosopher of Rostock (1724-1802), one of the pioneers of Electro-magnetism, not the fanatical 

 colleague of Martin Luther. 



1817 TRAITE des CARACTERES PHYSIQUES des PIERRES PRECIEUSES, pour servir a leur Deter- 

 mination lorsqu'elles ont etc" taille'es ; with 3 plates, Svo. hf. calf (rare], 10s Qd 1817 



1818 TRAITE ELEMENTAIRE de PHYSIQUE; with 24 plates, 2 vols. Svo. sewn, uncut, 5s 1803 



1819 ELEMENTARY. TREATISE on NATURAL PHILOSOPHY, trans, by OLINTHUS [GILBERT] 



GREGORY, LL.D., 24 copperplates, 2 vols. Svo. old hf. calf, uncut, 7s Qd 1807 



