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



1820 HAtJTT (Rene Just, de V Academic, ; Chanoine de Paris) TRAITE de MINERALOGIE ; 2 e Ed., 

 consid^rablement augmente'e, 4 vols. 8vo., and Atlas, containing 120 plates, oblong 4to. 5 vols. 

 old calf gilt, Tis&d 1822-3 



LAST AND BEST EDITION of the author's most important work, containing his discovery of the geometrical law of 

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 Cath"lic, and wax thrown into prison during the Revolution for refusing t<> 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, 3s 1846 



1822 HAWKES (Samuel, Fellow of Trinity) SKETCH of the PRINCIPLES of the DIFFERENTIAL CAL- 

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'Mr. [James] Challis [F.R.S., 1803-82, oue of the discoverers of Neptune'}, Trin. Coll. with S. H.'s complts.' Inscr. 

 on corer. 



1823 HAWKES (Thomas) : The ART of ^SVRrnNG 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, with Opiates, 

 4 to. (pp. 35). sewn, 15s 1747 



1824 HAWNEY (William, author of 'The Complete Measurer') The DOCTRINE of PLAIN and 

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RARE ; unknown to Watt, Lowndes, or Allibone. 



1825 HAYDEN" (William, Chichester) A VERY CLOSE APPROACH to the GEOMETRICAL QUADRA- 

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

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1826 HAYDN'S DICTIONARY of SCIENCE, comprising Astronomy, Chemistry, Physics, and Meteoro- 

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

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

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



1828 HA. YES (Richard) The NEGOCIATOR'S MAGAZINE: or the most Authentic Account yet 

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1529 : An APPENDIX to HAYES'S INTEREST BOOK, shewing, by Addition, how to cast up Bank, 



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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 ; 

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 12s Qd 1746 



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

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1831 HAYTEB, (Charles, portrait painter) NEW PRACTICAL TREATISE on the THREE PRIMITIVE 

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

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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, 4s Washington, 1882 



1833 - - THERMOMETER EXPOSURE, diagrams, roy. 4to. sewn, 2s Qd ib., 1885 



1834 HEAP (Major David Porter, U.S.A.) REPORT on the INTERNATIONAL EXHIBITION of 

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Washington, 1884 



1835 HEABN (George Whitehead, R.M.C., Sandhurst) INVESTIGATION of an EXTENSIVE CLASS of 

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1836 - RESEARCHES on CURVES of the SECOND ORDER, also on Cones and Spherical Conies 

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1837 - ANOTHER COPY, prize calf extra, g. e., 5s 



1838 HEATH (Robert Samuel; V.-P. Univ. Birmingham) TREATISE on GEOMETRICAL OPTICS, 

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



1830 SECOND [LAST] EDITION, revised and enlarged, diagrams, Svo. cl., 7s (p. 12s Qd) a. e.., ib., 1895 



The standard work on the subject. 



1840 HEATH (Thomas, Roy. Obs., Edin.) The TWENTIETH CENTURY ATLAS of POPULAR ASTRO- 

 NOMY, with coloured front., 21 plates (12 coloured), and 44 woodcuts, colombier Svo. cl., 4s 

 (p. 7* Qd) 1903 



