544 HENRY SOTHERAN & CO., 140, STRAND, W.C, and 43, PICCADILLY, W. 



10926 LOBRY de BRXJYN (C. A.) The Flashing Point of Petroleum, 8vo. {pp. 57), sewn. 

 Is 6d , [18963 



10927 , et J. W. van GEUNS: Corps Arom\tiques Nitres XVII : Etude comparative des 



trois Dinitrobenzenes IV. Action dii Cyanure de Potassium, roy. Svo. (pp. .36), sewn, Is 6d 



Leide, 1904 



10928 , and C. H. SLUITER: The Beckmann-Rearrangement : Transformation of 



Acetophenoxime into Acetanilide and its Velocity, irapl. 8vo. (pp. 6), sewn, Is 



[Amsterdam, 1904]; 



10929 , et Alphonse STEG-ER ; Influence de I'Eau sur la Vitesse de Formation des 



Ethers Ordinaires, roy. 8vo. (pp. 16), sewn, Is Leide, 1899 



10930 LOCK (Alfred George) Gold : its Occurrence and Extraction ; the Geographical and 

 Geological Distribution of Gold-bearing Rocks, Modes of Working Shallow Placers, etc., 

 Hydraulicing, the Reduction and Separation of Auriferous Quartz, the Treatment of Complex 

 Ores containing other Metals ; also a Bibliography, and a Glossary of English and Foreign 

 Terms, with 185 woodcuts, and 6 maps, thick impl. 8vo. (pp. 1250), cl. {cover soiled) ; o. p., 

 lis Qd p. (£2. 12s M) 1882 



The most extensive work on the subject ever written, and indispensable as a work of reference. 



10931 LOOK (Charles George Warnford) Mining and Ore- Dressing Machinery: a comprehensive 

 Treatise dealing with the Modern Practice of winning both Metalliferous and non-Metalliferou& 

 Metals, including all the Operations incidental thereto, and preparing the Product for the 

 Market, with 639 woodcuts, thick roy. 4to. cl., £\. Is (p. £2. 12s 6^) 1890 



10932 Workshop Receipts, third series, illustrated, post 8vo. cl.. Is %d (p. 5s) 1885 



10933 , G. W. WIGNER, and Robert Henry HARLAND, ff.i.c. : Sugar Growing and 



Refining : a Comprehensive Treatise on the Culture of Sugar-Yielding Plants, and the Manu- 

 facture, Refining, and Analysis of Cane, Beet, Maple, Melon, Milk, Palm, Sorghum, and Starch 

 Sugars, with copious Statistics, and Chapter on the Distillation of Rum, with 10 folding plates 

 and 205 woodcuts, thick 8vo. cl. {o. p.), 12s Qd (p. £1. 10s) 1882 



10934 LOCK (John Bascombe, pr. ; Caius Coll.) Dynamics for Beginners, 3rd Edition, loith 

 numerous diagrams, cr. 8vo. cl., 2s Qd 1890 



109.35 Treatise on Higher Trigonometry, 4th Edition, enlarged, with numerous diagrams, 



cr.8vo.cl., 2s 6d 1893 



10936 LOCKE (John, f.r.s.) Elements of Natural Philosophy, to which are added some 

 Thoughts concerning Reading and Study for a Gentleman, ivith portrait after Kneller, 12mo. 

 contemporary sheep {Joints cracked), 4s [1750] 



10937 LOCKE (Joseph, m.p., c.e., f.r.s.): Bow-String Bridge Ribs: a Description of Ribs pre- 

 pared for a Bridge over the Regent's Canal, London, for the Blackwall Extension Railway, 

 by Messrs. Fox, Henderson and Co., under the Direction of Joseph Locke, m.p., f.r.s., with 3 

 folding plates (linen-mounted), 4to. cl., 5s London Works, near Birmingham, 1849 



This was for the bc^cinning of the original North London Railway, which was an extension of the North-Western from 

 Challc Farm to the Blackwall Railway and the Docks, and was th-s line on which Mr. Briggs was murdered by Miiller. 

 The bowstring girder had a long vogue, but is now hardly rigid enough for the enormous moving weights of the modern 

 express train. 



10938 , The Life of, by Joseph Devey, with steel portrait, 8vo. cl., 5s (p. 14s) 1862 



10939 LOCKHAKT (James) Leerwijze om den Cubik-Wortel uit alle Getallen te trekken, roy. 

 8vo. (pp. 11), sewn, 3s Qd apud auctorem [Haarlem, 1821] 



10940 Method of Approximating towards the Roots of Cubic Equations belonging to the 



Irreducible Case, ivith diagrams, impl. 8vo. boards, uncut {scarce), Qs 6d R. Ackermann, 1813 

 ' Presented to me by J. Lockhart Bsqre. Beets.' — Inscr. on AyUaf. 



The author, who is overlooked in D. N. B., was according to Poggendorff, ' ein reicher Privatmann, der von 1S19 bis 

 183") in Harlem und darauf an verschiedenen Orten von England lebte. Mitglied der Astronomical Society.' On the title 

 of the Dutch work, which has the preface initialled and the dates filled up in his autograph, he styles himself ' heer van 

 Lanhams. in het graafschap van Essex.' 



10941 LOCK WOOD (Thomas Dixon) Practical Information for Telephonists, large 12mo. 



moroco neat {title stamped), 2s New York, 1882 



10942 LOCOMOTIVE (The) of To-day, reprinted, with Revisions and Additions, from ' The 

 Locomotive Magazine' ; third Edition, with 56 illustrations {including 19 plates), 8vo. cl., 2s 1904 



No*", a mere collection of engine-portraits, but a complete treatise on construction and working. 



10943 LOEWY (Moritz ; de VInstitut) Bahnbestimmung des ersten Kometen 1857 : U ber die 



Bahn des Cometen V 1858: des Kometen Donati : Elemente der Bahn des von Bruhns 



am 21. Mai 1858 in Berlin entdeckten Kometen — 4 parts roy. 8vo. unbound, 3s Qd Wien, 1858-9 



10944 :6phemeride3 des Etoiles de Culmination Lunaire et de Longitude, 1892-1904; 



13 parts 4to. sewn, 15s (p. F. 39 nett) 1891-1902 



10945 Etude des Conditions a realiser dans I'Execution des Cliches pour obtenir 



I'Homogendite et le Maximum d'Exactitude dans la Determination des Coordonnees des Images 

 Stellaires, etc. etc., 4to. (pp. 7), sewn. Is 6c? 1902 



10946 Recherches sur la Determination des Constantes des Cliches Photographiques 



du Ciel ; with diagrams, 4to. sewn, with author's inscr., 5s 6c? 1893 



10947 , et Pierre PUISEUX: Atlas Photographique de la Lune, public par I'Observatoire 



de Paris ; Parts 2-6 and 8 {text only), 6 parts 4to. sewn, £1. Is Imprimerie Nationale, 1897-1904 



1094S Theorie du Systi^me Optique compose d'une Lunette Astronomique et^d'un 



Double Miroir Plan. Application k la Mesure precise des Distances en Vue de I'Etude 

 de r Aberration et de la Refraction ; with 27 diagrams, 4to. seu:n, 3s Qd 1891 



10949 Recent Progress accomplished by Aid of Photography in the Study of the 



Lunar Surface, S^j/a^es of lunar photographs, roy. 8vo. (pp. 17), sewn, Is Qd Washington^ 1900 



