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



1820 HAttY (Rene Just, de VAcad^mie; Chanoine de Paris) Traite de Mineralogie ; 2^ Ed., 

 considerablement augment^e, 4 vols. 8vo., and Atlas, containing 120 plates, oblong 4to.— 5 vols. 

 old calf gilt. Vis M ' 1822-3 



Last and best edition of the author's most important work, containing liis discovery of the geometrical law of 

 crystallisation and of piezo-elpctricity. Though one of the foremost mineralogists and electricians of the age he was a good 

 Catholic, and wa-* thrown into pri^on during the Revolution for refusing to take the oaths required of a priest. 



1821 HAVILAND James) Tables of Specific Gravities of all Substances ; Land Measuring ; the 

 Old and New Weights and Measures ; etc. etc., new Ed., 8vo. boards, 3* 1846 



1822 HAWKES (Samuel, Fellow of Trinity) Sketch of the Principles of the Differential Cal- 

 culus, with Appendix, 4to. sewn {scarce), 6s Qd Cambridge, 182:^ 



' Mr. [James] Challii [f.r.s., 1S03-S2, one of the discoverers of Neptune], Trin. Coll. with S. H.'s complts.' — laser, 

 on. cnrer. 



1823 HAWKES (Thomas) : The Art of Writing Geometrically Demonstrated, and compared 

 with Clark's and Snell's Mathematical Method ; of Great Use to Painters, Stone-Cutters, 

 etc. ; discovered and designed by T. H., improved and taught by Thomas Davey, ivith ^ jdates, 

 4 to. (pp. 35), sewn, 155 1747 



1824 HAWNEY (William, aidhor of 'The Complete Measurer') The Doctrine of Plain and 

 Spherical Trigonometry, with its Application and Use in Navigation, Astronomy, Dialling, 

 etc., ivith numerous diagrams and copperplates, 8vo. old calf, \0s 6d 1725 



Rare ; unknown to Watt, Lowndes, or AUibone. 



1825 HAYDEN (William, Chichester) A Very Close Approach to the Geometrical Quadra- 

 ture of the Circle : a Construction wherein no Error is found on Investigation, according to the 

 llatio 3.14159 etc., fold incf plate, roy. 8vo. (pp. 4), sewn, Qs Chichester, 1872 



The author's own copy, with corrections. He calls himself the ' discoverer of the proportions of the Great Pyramid ', 

 and states that the above work was laid before the Royal Society by Prof. Stokes. 



1826 HAYDN'S Dictionary of Science, comprising Astronomy, Chemistry, Physics, and Meteoro- 

 logy, with a History of the Physical Sciences, ed. by C. Farrer Rodwell, f.r.a.s., thick 8vo. 

 cL, 5s (p. \8s) 1871, orn. d. 



1827 HAYES (Charles; Sub-Governor of the Roy. African Co.) Treatise of Fluxions: or Intro- 

 duction to Mathematical Philosophy, containing a full Explanation of that Method by which the 

 most celebrated Geometers of the present Age have made such vast Advances in Mechanical 

 Philosophy, numeroiis diagrams, folio, sound copy in contemporary calf (RARE), £1. Is 1704 



' The first English work explaining Newton's niethod of infinitesimals. After an introduction setting forth most of tln' 

 chief properties of the conic sections with concise proofs, Hayes applies Newton's method clearly and systematically, first 

 to obtain the tangents of curves, then their areas, and lastly the problems of maxima and minima. His preface shows a 

 good acquaintance with the existing literature of higher mathematics.'— D. N. 11. 



1828 HAYES (Richard) The Negociator's Magazine : or the most Authentic Account yot 

 published, of the Monies, Weights, and Measures of the World, also the European Exchanges, 

 the Laws and Customs of Bills of Exchange, Promissory Notes, etc. etc., also Curious Calcula- 

 tions of great Use in the West Indian and American Trades, etc. etc. ; 9th Ed., with new and 

 useful Tables, by Benjamin Webb, thick 8vo. old calf, neudy rebacked, \Qs (Sd 17fi4 



1S29 : An Appendix to Hayes's Interest Book, shewing, by Addition, how to cast np Bank, 



India, South-Sea Stock, Annuities, lioyal and London Assurances, African, Million-Bank, York- 

 Buildings, Lottery Tickets, etc. etc. etc., with Table of great Use to the Proprietors of Stocks, 

 Annuities, and Bonds, etc. etc., by the Author of Interest at ONE View, sq. 16mo. old sheep, 

 joints cracked {rare), 15* 173.S 



1830 New Method for Valuing of Annuities upon Lives, with many useful Examples and 



Instructions for valuing of Single Lives ; Two or more Lives ; Lives taken with other Lives ; 

 Keyersion of Lives, etc. etc. etc., corrected Ed., 4to. large and clean copy in old mottled calf, 

 \2s 6d 1746 



An early work on the subject, wherein the author claims to have ' reduced it into a much plainer and easier Method 

 than has ever been hitherto published, and made it intelligible and useful to those who have not had the opportunity of an 

 Arithmetical Education, as well as to the compleatest Arithmetician.' 



1831 HAYTER (Charles, portrait painter) New Practical Treatise on the Three Primitive 

 Colours, assumed as a Perfect System of Kudimental Information, 6 plates (4 coloured), 4to. 

 boards, os 1826 



1832 HAZEN (Henry Allen) The Reduction of Air-Pressure to Sea-Level, at Elevated Stations 

 West of the Mississippi River, 20 maps, roy 4to. sewn, 4* Washington, 1882 



1833 Thermometer Exposure, diagrams, roy. 4to. sewn, 2s 6c? ib., 1885 



1834 HEAP (Major David Porter, u.'s.A.) Report on the International Exhibition of 

 Electricity at Paris, 1881, ii-ith 14: plates and over 200 other illustrations, 8vo. cl., 4s 



Washington, 1884 



]83j HEARN (George Whitehead, r.m.c, Sandhurst) Investigation of an Extensive Class of 



Partial Differential Equations of the Second Order, in which the Equation of Laplace's 



Functions is included, 4to. (pp. 6), hf boutid, Ss 6d 1846 



1836 Researches on Curves of the Second Order, also on Cones and Spherical Conies 



treated analytically, with many Properties entirely original, diagrams, 8vo. bds., 3s 6d 184G 

 1837 Another Copy, prize calf extra, g. e., 5s 



1838 HEATH (Robert Samuel; V.-P. Univ. Birmingham) Treatise on Geometrical Optics, 

 numerous diagrams, 8vo. cl., 5s (p. 12* Qd) Univ. Press, Cambridge, 1887 



1839 Second [last] Edition, revised and enlarged, diagrams, 8vo. cl., 75(p. 125 Qd) a. e.., ib., 1895 



The standard work on the subject. 



1840 HEATH (Thomas, Boy. Obs., Edin.) The Twentieth Century Atlas of Popular Astro- 

 nomy, with coloured front., 21 plates (12 coloured), and 44 woodcuts, colombier 8vo. cl., 4s 

 i^.lsQd) ..." 1903 



