1620 HENRY SOTHERAN & CO., 140, STRAND, W.C.. and 43, PICCADILLY, W. 



12462 NEWCOMB (Simon; U.S. Naval Observatory, f.r.s.) Astronomy for Everybody: a 

 Popular Exposition of the Wonders of the Heavens, with Introduction by Sir Robert S. Ball, 

 F.R.S. , 65 illustrations, 8vo. cl., t. e.g., ^s Qd (p. 7* M) ' 1903 



12463 On Boss's System of Declinations and on that of the Astronomische Gesellsehaft, 4to. 



(pp. 8), unbound, \s Boston [Mass.], 1896 



12464 Catalogue of 1098 Standard Clock and Zodiacal Stars, roy. 4to. d., Qs 



^Washington, 1881] 



12465 (compendium of Spherical Astronomy, with its Applications to the Determination 



and Reduction of Positions of the Fixed Stars, with 36 diagrams, 8vo. cl., 8s (p. 12* 6d nett) 



New York, 1906 



12466 Discussion of the JS^Orth Polar Distances observed with the Greenwich and Washing- 

 ton Transit Circles, with Determinations of the Constant of Nutation, roy. 4to. (pp. 80), sewn, 2s 



[ibidem, c. 1885] 



12467 Sur les Formules de NUTATION basees sur les Decisions de la Conference de 1896, 8vo. 



(pp. 6), sewn, Is [1898] 



12468 Investigation of Corrections to Hansen's Tables of the Moon ; with Tables for 



their Application, 4to. (pp. 51), sewn, 2s Washington, 1876 



12469 A New Determination of the Precession al Motion, roy. 4to. (pp. 7), sevm, \s Qd 



Boston IMass.'], 1897 

 The author ascertained the annual precessional vahie a.s + 0.000222", the most accurate one hitherto given. 



12470 Observations of the Transit of Venus, Dec. 8-9, 1874, made and reduced under the 



Direction of the Commission created by Congress, with 2 folding plates of the photo-heliograph, 

 4to. cl., 4s Washington, 1880 



12471 Periodic Perturbations of the Longitudes and Radii Vectores of the Four 



Inner Planets of the First Order as to the Masses, roy. 4to. (pp. 174), sewn, Ss [ibid., 1891] 



12472 Popular Astronomy, ivith front., 112 woodcuts, and 5 star maps, 8vo. cl., 4s 6c/ (p. 18s) 



1878 

 An invaluable work to the amateur astronomer, including a good bibliography of the best astronomical works, ancient 

 and modern. 



12473 The Problems of Astronomy, 8vo. (pp. 10), sewn. Is Washington, 1S98 



12474 On the Recurrence of Solar Eclipses, with Tables of Eclipses from B.C. 700 to a.d. 



2300, 4to. (pp. 55), sewn, 2s 6rf ib., 1879 



' a very interesting memoir.'— G. F. Chambers, F.R.A.S. 



12475 The Reminiscences of an Astronomer, with portrait, 8vo. cl., 4s (p. 10* 6d) 1903 



12476 Researches on the Motion of the Moon, made at the United States Naval Observatory, 



Washington : Part I : Reduction and Discussion of Observations of the Moon before 1750, 4to. 

 seivn, 6s Washington, 1878 



Investigating the errors of Hansen's Lunar Tables (q. v. ante) as compared with observations before 1750. 



' Newcomb further showed that small residual irregularities are still found in the moon's movements, inexplicable either 

 by any known gravitational influence, or by any uniform value that could be assigned to secular acceleration.' — Miss 

 Agnes M. Gierke. 



12477 La Theorie du Mouvement de la Lune : son Histoire et son Etat actuel, impl. 8vo. 



(pp. 9), seion, with author^s inscr., \s 6d Roma, 1909 



12478 : Simon Newcomb: Memorial Addresses by Charles K. Wead, James Bryce, Milton 



Updegraff, R. S. Woodward, etc. etc., with portrait, roy. Svo. (pp. 35), sewn, \s%d 



Washington, 1910 



12479 NEWELL (Frederick Haynes) Report of the Progress of Stream Measurements for 

 1902, 4 vols. Svo. sewn, 4s U.S. Geol. Survey, Washington, 1903 



12480 NEWKIRK (Burt L., Minneapolis) Eine Untersuciiung der Parallaxe des Zentral- 

 STERNES des Ringnebels in der Leier, Inaugural-Dissertation, roy. 8vo. (pp. 37), seum, with 

 author's inscr., 2s Miinchen, 1902 



12481 NEWLANDS (John A. R.; f.i.c.) On the Discovery of the Periodic Law, and on Relations 

 among the Atomic Weights, ivdh 2 folding tables, post Svo. cl., with author's inscr. {scarce), 

 Qs %d 1884 



The periodic law was discovered simultaneously, but independently of one another, by the author and Prof. Lothar 

 Meyer {q. v. ant'), and received its classic development by Prof. Mend'elejeflf, who by its means predicted the existence of 

 certain elements then unknown, which were afterwards actually discovered. 



' I claim to have been the first to publish a list of the elements in the order of their atomic weight, and also the first to 

 describe the periodic law, showing the existence of a simple relation between them when so arranged.'— Pre/ace. 



12482 NEWMAN (Francis William ; brother of Cardinal Newman) The Difficulties of Ele- 

 mentary Geometry, especially those which concern the Straight Line, the Plane, and the Theory 

 of Parallels, with 122 illustrations, Svo. sewn (scarce), 5s 1841 



The author was evidently ignorant of the work of Lobatschewsky, Gauss, and Bolyai on parallel lines, which he 

 does not mention, although he quotes Legendre's treatment, and T. P. Thompson's ' proof. 



12483 N'EW'SILAN (John, philosophical instrument maker to the Royal Institution) DESCRIPTION of 

 OsLER's Registering Anemometer, ivith folding plat.',, 8vo. (pp. 9), unbound, Zs 1840 



12484 Instructions for Fixing the Standard Barometer, with woodcut, Svo. (pp. 3), 



unbound, \s n. d. 



12485 : Miner's Safety Lamp : an Account of his Improvement on Sir Humphry Davy's, 



with 8 woodcuts, Svo. (pp. 10), unbound, 3s 6d [1835] 



The improvement consists of the addition of an outer cylinder of wire gauze. It was awarded the silver medal by the 

 Society of Arts. 



12486 NEWNHAM (Philip Hankinson, pr., f. r.met.s.) The Climate of Bournemouth, with 13 

 tables, Svo. (pp. 16), sewn, 2s Bournemouth [1869] 



