HENRY SOTHEllAN & CO., 140, STRAND, W.C., AND 37, PICCADILLY, W. 319 



6251 BLACKBURN (Isaac, skip-builder, Plymouth] THEORY and SCIENCE of NAVAL ARCHI- 

 TECTURE, familiarly explained and intimately blended with the ART ; with Practical Conclusions 

 tending to its further Improvement, and to the CONSTRUCTING of SHIPS for FAST SAILING ; with 

 important Hints for the MANAGEMENT of SHIPS at SEA, 8vo. hf. bound (scarce], Is Qd Plymouth, 1836 



There was no copy of this work in the Scott Library. 



6232 BLACKETT (T. Oswald) ESSAY on the USE of the SPIRIT LEVEL, as applied to Engineering 

 etc. , with 5 folding plates and numerous other illustrations, Svo. hf. calf (scarce], 5s 



Newcastle-on-Tyne, 1838 



Claiming to be the first connected treatise on the subject in the language. The plates include a profile of part of the 

 Newcastle and Carlisle Railway, then just built. 



6253 BLAG-DEN (Sir Charles, M.D., F.RS.) EXPERIMENTS on the COOLING of WATER BELOW its 

 FREEZING POINT, 4to. (pp. 22), sewn, 3s Qd 1788 



' The most noteworthy of his physical papers.' D. N. B. 



6254 EXPERIMENTS on the EFFECT of various SUBSTANCES in LOWERING the POINT of CON- 

 GELATION in WATER, 4to. (pp. 36), sewn, 3s 1788 



6255 - HISTORY of the CONGELATION of QUICKSILVER, 4to. (pp. 71), sewn, with inscr. to Gen. 

 Robert Melville, F.R.S. (inventor of a naval gun], 5s 1784 



6256 REPORT and SUPPLEMENTARY REPORT on the best METHOD of PROPORTIONING the 



EXCISE on SPIRITUOUS LIQUORS, 2 parts 4to. (pp. 56), sewn, 3s Qd 1790-2 



6257 - OBSERVATIONS on ANCIENT INKS, with the Proposal of a New Method of Recovering the 

 Legibility of Decayed Writings, 4to. (pp. 7), sewn, 3s 1787 



This paper was unknown to Poggendorffand the author's biographer in D. N. B. 



6258 BLAIR (Andrew Alexander) The CHEMICAL ANALYSIS of IRON : a complete Account of all 

 the best known Methods for Iron, Steel, Pig-iron, Iron Ore, Limestone, Slag, Clay, Sand, Coal, 

 Coke, and Furnace and Producer Gases, 6th Ed. [enlarged] , with 103 woodcuts, sq. 8vo. hf. red 

 leather, 10s Qd (p. 18* nett) Philadelphia, 1906 



6259 BLAIR (J. A.) ORGANIC ANALYSIS of POTABLE WATERS, diagrams, cr. 8vo. cl., 2s 1890 



6260 BLAISE (F. E., Interne des Asiles d'Alienesde la Seine) A TRAVERS la M ATIKRE et 1'ENERGIE ; 

 with 68 illustrations, roy. Svo. sewn, Qs Qd (p. F. 12 nett) [1902] 



6261 BLAKE (John Frederick) ASTRONOMICAL MYTHS, based on Flammarion's ' History of the 

 Heavens,' with plates and numerous luoodcuts (many from old prints], and chart, large post Svo. 

 cl., uncut (scarce), 7s Qd 1877 



A valuable popular history of astronomy from the earliest times to Copernicus. 



6262 BLAKE (William Phipps) NOTICES on MINING MACHINERY, and Mechanical Appliances in 

 Use, chiefly in the Pacific States and Territories, for Mining, Raising, and Working Ores, with 

 Comparative Notices of Foreign Apparatus, plates and numerous woodcuts, roy. Svo. cl., 4s 



New Haven, Conn., 1871 



6263 BLAKESLEY (Thomas Holmes, M.I.C.E.) GEOMETRICAL OPTICS, with 33 diagrams, cr. Svo. cl., 

 Is Qd 1903 



Written to correct the errors due to our national imperfect definition of Focal Length. 



6264 - PAPERS on ALTERNATING CURRENTS of ELECTRICITY, 2nd Ed., enlarged, with 29 woodcuts, 

 post Svo. cl., 2s (p. 4,? Qd) 1889 



6265 BLANCARD (Steven; M.D., Amsterdam) THEATRUM CHIMICUM, oder Eroffneter Schau- 

 Platz und Thiir zu den HEIMLIGKEITEN in der SCHEIDE-KUNST, nebenst einer Vermehrung wie 

 die geringen Metallen und gemeinen Steine zu verbessern sind, durch [SiR] KENELM DIGBY ; 

 with 11 copperplates, 12mo. contemporary stamped pigskin, with clasps (one defective), 1. Is 



Leipzig, 1700 



RARE, and unknown to Graesse, Ebert and Brunet. It was also apparently unknown to Mr. A. E. Waite, who does not 

 include it in a copious list of Alchemical Writers in his ' Lives of Alchemical Philosophers.' 



6266 BLANCHABD (Jean Pierre) : EXACT and AUTHENTIC NARRATIVE of M. BLANCHARD'S 

 THIRD AERIAL VOYAGE, July 18, 1784, accompanied by M. BOBY; in which they traversed 

 a Space of 45 Miles in 2| Hours, with FOUR CERTIFICATES testifying the Truth of the Relation ; 

 and signed by several Respectable Characters, trans, [with Preface by the Translator] , with .fine 

 engraved front, of the Balloon, 4to. (pp. 25), sewn (VERY SCARCE), 1. 15s 1785 



Blanchard's balloon was the first containing wings and a rudder as well, was 27 feet in diameter, charged with hydrogen 

 gas, and 'had a sort of large umbrella spread horizontally between the balloon and the boat, which, in case the balloon 

 should burst, would check the fall.' Hatton Tumor, who did not know the above work. 



Blanchard was the tirst to cross the Channel in a balloon, with the American, Dr. Jeffries, and the first to make, in 1TS5, 

 a balloon ascent in London. He died of apoplexy in 1808 when making his 66th ascent. 



6267 BLANE (William, F.R.S.) PARTICULARS relative to the PRODUCTION of BORAX, 4to. (pp. 4), 

 sewn, Is Qd 1787 



A letter to (probably) the writer's brother Sir Gilbert Blane, F.B.S., the extirpator of scurvy from the Navy. It refers 

 to the production of borax in the N.W.P., India, from a probable source in Tibet. 



6268 BLASERNA (Pietro, Univ. Rome] The THEORY of SOUND in its RELATION to Music, 

 3rd Ed., with 39 woodcuts, cr. Svo. cl., 2s Qd (p. 5s) 1883 



6269 BLENKARN" (John, C.E.) PRACTICAL SPECIFICATIONS of WORKS executed in Architecture, 

 Civil and Mechanical Engineering, and in Roadmaking and Sewering ; with practically Useful 



6271 BLIM (E.), et ROLLET de 1'ISLE: MANUEL de FEXPLORATEUR : Precedes de Levers 

 rapides et de Detail ; DETERMINATION ASTRONOMIQUE des POSITIONS GEOGRAPHIQUES ; with 89 

 woodcuts, cr. Svo. cl., with bookplate of Dr. Emil Reich, 2s Qd 1899 



A work much to be recommended to discoverers of the North Pole s 



22 * 



