HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 43, PICCADILLY, W. 451 

 HARBOUR and DOCK WORKS : AVONMOUTH DOCK, by J. B. MACKENZIE : The RIVER 

 LAGAN and HARBOUR of BELFAST, by T. R. SALMOND : WHITEHAVEN HARBOUR and DOCK 

 WORKS, by J. E. WILLIAMS, MM.I.C.E. : with Abstract of the Discussion, ed. by JAMES FORREST, 

 8vo. (pp. 48), sewn, 2s Qd 1878 



8900 HARDWICK (Thomas Frederick, pr.) MANUAL of PHOTOGRAPHIC CHEMISTRY, including 

 the COLLODION PROCESS, 5th Edition, illustrated, fcap. 8vo. (pp. 532), cl. (scarce), 6s Qd 1859 



Of interest to the historian of photography for containing a number of processes and recipes long since forgotten. 



8901 SEVENTH EDITION, edited by G. DAWSON and E. HADOW, illustrated, fcap. 8vo. (pp. 610), 



cl., 3s Qd 1864 



8902 NINTH [LAST] EDITION, edited by J. TRAILL TAYLOR, with 57 illustrations, fcap. 8vo. 



cl. (o.p.), 4s Gd 1883 



8903 HARDY (Antoine Franqois) EXPERIENCES sur les CIDRES, les POIRES et les BIERRES ; sur les 

 FALSIFICATIONS de ces BOISSONS; sur les differents MOYENS de les DECOUVRIR, etc., 4to. sewn 

 (rare), 12s Gd . Rouen, 1785 



The author took a prominent part in the French Revolution, and was one of the few Girondists who escaped the 

 guillotine. 



The above work was unknown to the author's biographer in Biogr. Gen., Querard, and other bibliographers. 



8904 HARDY (Godfrey Harold, F.R.S.) The INTEGRATION of FUNCTIONS of a SINGLE VARIABLE, 

 8vo. sewn, 2s Univ. Press, Cambridge, 1905 



8905 HARDY (Peter, F.R.S.) A NEW and GENERAL NOTATION for LIFE CONTINGENCIES, 8vo. cl., 

 with inscr. to Benj. Gompertz, F.JR.S., 5s 1840 



An attempt to introduce a uniform notation in insurance mathematics. 



8906 HARE (Robert, M.D., Univ. Penna.) DESCRIPTIONS of APPARATUS and PROCESSES for the 

 ISOLATION of the METALS of the ALKALINE EARTHS, with woodcuts, 4to. (pp. 26), 3* 



Philadelphia, 1840 



8907 EXPERIMENTAL OBSERVATIONS and IMPROVEMENTS in APPARATUS and MANIPULATION ; 



with Theoretical Suggestions respecting the Causes of Tornadoes, Falling Stars, and the Aurora 

 Borealis, front, of chemical laboratory and lecture room, and numerous woodcuts, 4to. sewn, 4s Qd 



ibidem, 1836 



8908 HARGREAVE (Charles James, Q.C., F.R.S. ; Judge of Landed Estates Court, Ireland) On the- 

 CALCULATION of ATTRACTIONS, and the FIGURE of the EARTH, 4to. (pp. 23), sewn, 2s Qd 1841 



8909 ESSAY on the RESOLUTION of ALGEBRAIC EQUATIONS [with Preface by GEORGE SALMON, 



pr., Provost of T.C.D.], 8vo. cl. (scarce), Qs Qd privately printed, Dublin, 1866 



' The present essay, humanly speaking, may be regarded as the cause of his death.' Dr. Salmon. ' In 1866 his attention 

 was again drawn to a new method of solving algebraic equations, and he began an essay on this question. Want of rest 

 brought on an exhaustion of the brain, from which he died at Bray on April 23rd '. D. N. B. 



8910 HARKER (Alfred, F.R.S.) The BALA VOLCANIC SERIES of CAERNARVONSHIRE and associated 

 Rocks (Sedgwick Prize Essay, 1888), with 6 plates, 8vo. cl., 3s (p. Is Qd) 



Univ. Press, Cambridge, 1889 



8911 HARLEY (Robert, F.R.S.) On the INTERCHANGE of Two DIFFERENTIAL RESOLVENTS,. 8vo. 

 (pp. 11), sewn, Is Qd Manchester, 1892 



8912 HARLEY (Timothy, F.R.A.S.) LUNAR SCIENCE : Ancient and Modern, 8vo. cl., 2s 1886 

 HARPER'S SCIENTIFIC MEMOIRS, edited by J. S. AMES, illustrated, large post 8vo. cl., as under : 



8913 I. The Free Expansion of Gases : MEMOIRS by GAY-LUSSAC, JOULE, and JOULE and 

 THOMSON [LORD KELVIN], translated and edited by J. S. AMES, 2s (p. 3s Qd nett) New York, 1898 



8914 II. Prismatic and Diffraction Spectra : MEMOIRS by JOSEPH v. FRAUNHOFER, trans, and 

 ed. by J. S. AMES, 2s (p. 3s nett) ib., 1898 



8915 III. Rb'ntgen [X] Rays : MEMOIRS by RONTGEN, STOKES, and [Sm] J. J. THOMSON, trans, 

 and ed. by G. F. BARKER, 2s (p. 35 nett) ib., 1899 



8916 IV. The Modern Theory of Solution : MEMOIRS by PFEFFER, VAN 'T HOFF, ARRHENIUS, 

 and RAOULT, trans, and ed. by H. C. JONES, 3s (p. 5s nett) ib. , 1899 



8917 V. The Laws of Gases : MEMOIRS by ROBERT BOYLE and E. H. AMAGAT, trans, and ed. 

 by CARL BARUS, -2s (p. 3s 6d nett) ib., 1899 



8918 VI. The Second Law of Thermodynamics : MEMOIRS by CARNOT, CLAUSIUS, and 

 THOMSON [LORD KELVIN], trans, and ed. by W. F. MAGIE, 2s Qd (p. 4s nett) ib. y 1899 



8919 VII. The Fundamental Laws of Electrolytic Conduction : MEMOIRS by FARADAY, 

 HITTORF, and F. KOHLRAUSCH, trans, and ed. by H. M. GOODWIN, 2s (p. 3s Qd nett) ib., 1899 



8920 VIII. The Effects of a Magnetic Field of Radiation : MEMOIRS by FARADAY, KERR, 

 and ZEEMAN, ed. by C. P. LEWIS, 2s (p. 3s Qd nett) ib., 1900 



8921 IX. The Laws of Gravitation : MEMOIRS by NEWTON, BOUGUER, and CAVENDISH, with 

 Abstracts of other important Memoirs, trans, and ed. by A. S. MACKENZIE, 3s (p. 5s nett) 



ib., 1900 



8922 X. The Wave Theory of Light : MEMOIRS by HUYGENS, YOUNG, and FRESNEL, ed. by 

 HENRY CREW, 3s (p. 5s nett) ib., 1900 



8923 XI XII. The Discovery of Induced Electric Currents : MEMOIRS by JOSEPH HENRY 

 and MICHAEL FARADAY, ed. by J. S. AMES, 2 vols. 4s (p. 7s nett) ib., 1900 



8924 XIII. The Foundations of Stereo-Chemistry : MEMOIRS by PASTEUR, VAN 'T HOFF, 

 LEBEL, and WISLICENUS, trans, and ed. by G. M. RICHARDSON, 3s (p. 5s nett) ib., 1901 



8925 XIV. The Expansion of Gases by Heat : MEMOIRS by DALTON, GAY-LUSSAC, REGNAULT, 

 and CHAPPUIS, trans, and ed. by W. W. RANDALL, 3s (p. 5s nett) ib., 1902 



8926 XV. The Laws of Radiation and Absorption : MEMOIRS by PREVOST, STEWART, 

 KIRCHHOFF, and KIRCHHOFF and BUNSEN, trans, and ed. by D. B. BRACE, 3s (p. 5s nett) 



ib., 1901 



