HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 43, PICCADILLY, W. 455 



8994 HARZER (Friedrich) Die SIEGELLACKFABRIKATION, nach den neuesten Verfahren und den 

 bewahrtesten Vorschriften, post 8vo. sewn, 3s Qd Weimar, 1848 



8995 HASELDEN (Thomas, Teacher of Mathematics in the Royal Navy ; F.R.S.) 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'u Use, sm. 4to. contemporary sheep (binding slightly damaged, otherwise a 

 sound and clean copy) ; RARE, 12s Qd 1759 



Requiring only the most elementary knowledge of arithmetic to be understood. The above edition was unknown to 

 the author's biographer in D. N. B., who only mentions the reprint of 1788. 



8996 HASKELL (Mellen Woodman, Univ. Cal.) The CONSTRUCTION of CONICS under GIVEN 

 CONDITIONS, roy. 8vo. (pp. 6), sewn, with author's inscr., IsQd [New York, 1905] 



8997 HASKOLL (W. Davis, C.E ) The ASSISTANT ENGINEER'S RAILWAY GUIDE in BORING, with 

 the Tools and Methods of Proceeding, and Remarks on British Strata and their Contents as 

 Materials in Construction ; Stumping and Picking out Centre Lines and Curves, etc., etc., with 

 Practical Memoranda on Specifications, 3 folding plates and 60 woodcuts, 8vo. cl. (SCARCE), 

 105 Qd 1846 



8998 The ENGINEER'S, MINING SURVEYOR'S, and CONTRACTOR'S FIELD-BOOK: Tables for 



Traverse Surveying, Levelling with the Theodolite, Setting out Curves, and Earthwork Tables to 

 80 Feet deep, 2nd Edition, much enlarged, with numerous woodcuts, 12mo. cl., 3s (p. 12s) 1866 



8999 THE PRACTICE of ENGINEERING FIELD-WORK, applied to Land, Hydrographic, and 



Hydraulic Surveying and Levelling, and Waterworks, including the Description and Use of 

 Surveying and Levelling Instruments, and the Practical Application of Trigonometrical Tables, 

 with 27 folding and other plates, 2 vols. 8vo. cl., 6s (p. 2.) 1858-68 



9000 VOLUME II ONLY : WATERWORKS ; Gauging Streams, Sewers, Sewage and Irrigation, 



8vo. cl., 3s (p. 1.) 1868 



9001 HASSALL (Arthur Hill, M.D.) FOOD : its ADULTERATIONS, and the Methods for their 

 Detection, illustrated, 8vo. cl., 8s Qd (p. 1. 4s) 1876 



To Dr. Hassall we almost wholly owe our deliverance from the shameless and criminal adulteration of the first half of 

 the Nineteenth Century an adulteration fatuously styled by John Bright ' a form of competition ', which competition 

 was itself to bring to an end without the help of the law ! The law may have to keep a sharp eye on the adulterator still 

 but if we are sometimes robbed we are very seldom poisoned ; so let us remember Dr. Hassall ! 



9002 HASSELBEBG (Klas Bernhard, Stockholm) RUSSISCHE EXPEDITIONEN zur BEOBACHTUNG 

 des VENUSDURCHGANGS 1874. II. 1. BEARBEITUNG der PHOTOGRAPHISCHEN AUFNAHMEN im 

 HAFEN POSSIET ; with 11 diagrams, roy. 4to. sewn, 3s St. Petersburg, 1877 



9003 Ueber das durch electrische Erregung erzeugte LEUCHTEN der GASE bei NIEDRIGER 



TEMPERATUR, roy. 4to. (pp. 17), sewn, Is Qd ib., 1879 



9004 Zur SPECTROSKOPIE des STICKSTOFFES. I. UNTERSUCHUNGEN viber das BANDEN- 



SPECTRUM; with 5 folding plates, roy. 4to. (pp. 50), sewn, 3s ib., 1885 



9005 STUDIEN auf dem GEBIETE der ABSORBTIONSSPECTRALANALYSE ; with 4 folding .plates, 



roy. 4to. (pp. 39), sewn, 3s ib., 1878 



9006 HATCHETT (Charles, F.R.S.) ANALYSIS of the CARINTHIAN MOLYBDATE of LEAD ; with 



Experiments on Molybdic Acid, and some Experiments and Observations on the Decomposition of 



the Sulphate of Ammoniac, 4to. (pp. 55), sewn, 5s 1796 



7 ANALYTICAL EXPERIMENTS and OBSERVATIONS on LAC, 4to. (pp. 28), sewn, 3s 1804 



9008 OBSERVATIONS on the CHANGE of some of the proximate PRINCIPLES of VEGETABLES 



into BITUMEN ; with analytical Experiments on a peculiar Substance, which is found with the 

 BOVEY COAL, 4to. (pp. 26), sewn, 3s 1804 



The ' coal ' of the Bovey Heathfield, near Bovey Tracey in Devonshire, is a curious substance of much geological interest. 



9009 On an ARTIFICIAL SUBSTANCE, which possesses the principal Characteristic Properties of 



TANNIN, 4to. (pp. 16), sewn, 3s 1805 



9010 ANOTHER COPY, with ADDITIONAL REMARKS, and THIRD SERIES of EXPERIMENTS, with 



some Remarks on Coal, 3 parts 4to. (pp. 85), sewn, with author's irwcr., 8s 1805-6 



The author discovered columbium and tantalium. He was a member of the Literary Club, founded by Dr. Johnson, 



and furnished John Wilson Croker with a complete list of members, reprinted in the latter's edition of Boswell's Johnson. 



Oil HATTON (Edward, PhUomercat.) ARITHMETICK ; or, the Ground of Arts, originally composed 

 by DR. RECORD, and others, and now new 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 

 diagrams, 4to. contemporary calf gilt, newly rebacked (somewhat browned) ; rare, 1 4s 1699 



'The last edition of Recorde's Grminde of Artesl know of is that by Edw. Hatton, London, 1699, 4to. ; it has an 

 additional book called ' Decimals made easy '.'Pro/, de Morgan. 



MATHEMATICAL MANUAL: or, DELIGHTFUL ASSOCIATE, with diagrams, 8vo. con- 

 temporary calf gilt, 7s Qd 1728 



Containing chapters on 'Mysterious Curiosities in Numbers, or Numerical Novelties,' ' how to make a Line of Numbers, 

 r Logarithms, to any Length,' ' The Hour of the Night by the Moon shining on a Sun Dial,' etc. etc. etc. 



The MERCHANT'S MAGAZINE : or Trades-Man's Treasury ; containing Arithmetick, 



Merchants Accompts, Book-keeping, Maxims concerning Bills of Exchange, etc., the Port of 

 Letters to and from Foreign Countries, an Account of the Commodities produced by all Countries, 

 a Merchant or Trader's Dictionary, Precedents of Merchants Writings, etc., 8th Impression, 

 corrected and improved, with portrait cet. 32 by R. White, and 8 plates of specimens of calligraphy , 

 4to. old calf, neatly rebacked, \ls Qd 1726 



; NINTH IMPRESSION, corrected and improved, with portrait, and 8 plates, 4to. boards, 



' A ,., wor ]5 of some celebrity. There is somewhat more of reason given for rules than was very common, and a vast 

 quantity of mercantile terms, usages, etc. are explained.' Prof, de Morgan. 



