HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 43, PICCADILLY, W. 845 

 ASTRONOMY and GEODESY, continued: 



16898 PARKER (George W., T.C.D.) ELEMENTS of ASTRONOMY, with numerous Examples and 

 Examination Papers, 2nd [latest] Edition, with 84 diagrams, 8vo. cl., 3s 6d (p. 5s Qd nett) 1900 



16899 PECK (William, F.R.S.E., Director City Observatory, Edin.) POPULAR HANDBOOK and ATLAS 

 of ASTRONOMY, with 44 plates, and numerous text-illustrations, 4to. cl., t. e. g., 10s (p. 1. Is) 1890 



16900 PLASSMAN (Joseph Eduard Clemens Franz ; Univ. Miinster) HIMMELSKUNDE : Versuch 

 einer methodischen Einfiihrung in die Hauptlehren der Astronomic, 2. und 3. [neueste] Auflage ; 

 with coloured frontispiece, 282 illustrations, and 3 folding maps (linen- mounted), 8vo. hf. black 

 morocco neat, cl. sides (as good as new), 8s Qd (p. M. 11 sewn) Freiburg i. B., 1913 



16901 POINCARIJ (Henri Jules, de VInstitut ; F.R.S. ; cousin of the President of the French Re- 

 public) LECONS de MECANIQUE CELESTE professees a la Sorbonne ; with 2 folding maps (linen- 

 mounted), and numerous diagrams, 3 vols. roy. 8vo. in 2, handsomely bound in hf. pigskin, cl. 

 sides, uncut, t. e. g. (fine copy), 1. Is Qd (p. F. 39 nett sewn) 1905-10 



A well-known standard work. 



CONTENU : I. Theorie generale des Perturbations planetaires : II. 1. Developpement de la Fonction perturbatrice : 

 II. 2. Thdorie de la Lune: III. Theorie des Marges, redigee par E. FICHOT. 



16902 PORCHON (Paul) COURS de COSMOGRAPHIE, 5 e [derniere] Edition, revue; with Opiates 

 (linen-mounted) and 188 text-illustrations, 8vo. buckram, 3s Qd 1899 



16903 PROCTOR (Richard Anthony, F.R.A.S.) STAR ATLAS for Library, School, and Observatory, 

 showing all the Stars visible to the Naked Eye, and 1500 Objects of Interest, 14 double maps (in- 

 cluding 2 coloured index-maps), with Introduction, folio, cl., with Adml. Sir Erasmus Ommanney's 

 bookplate, 4s Qd (p. 15*) 1870 



16904 THIRD EDITION, with 14 plates (as above), folio, cl., 5s 1874 



16905 RESAL (Ame Henri, de VImtitut) TRAITE ELEMENTAIRE de MECANIQUE CELESTE ; with 

 folding plate, 8vo. hf. French morocco neat, 46? 1865 



16906 DEUXIEME [DERNIERE] EDITION [entierement refondue] ; with 26 diagrams, 4to. hf. 



maroon morocco neat, cl. sides, t. e. g. (fine copy), 15s (p. F. 25 nett sewn) 1884 



'Among valuable text-books on mathematical astronomy ranks Traite de Mecanique Celeste of H. Resal.' Prof. Cajori. 



16907 RUDAUX (L.) How to STUDY the STARS : Astronomy with small Telescopes and the naked 

 Eye, and Notes on Celestial Photography, translated by A. H. KEANE, with 69 plates and text- 

 illustrations, large cr. 8vo. cl., 3s (p. 5s nett) 1909 



16908 SCHEINER (Julius ; Prof. Astrophysics, Berlin) POPULARE ASTROPHYSIK ; with 30 plates 

 and 210 text-illustrations, 8vo. cl., Is Qd (p. M. 12) Leipzig, 1908 



16909 ZWEITE [NEUESTE] AUFLAGE, erganzt durch einige Nachtrage ; with 30 plates and 210 



text-illustrations, 8vo. cl., 10s (p. M. 14) ibidem, 1912 



An excellent semi-popular work on the subject. 



16910ISCHWAHN (Paul, DireUor der Urania, Berlin) MATHEMATISCHE THEORIE der ASTRONO- 

 MISCHEN FINSTERNISSE ; with 20 diagrams, post 8vo. stiff wrapper, 2s 6d Leipzig, 1910 



16911 SGHWALBE (Bernhard Georg), und H. BOTTGER: GRUNDRISS der ASTRONOMIE, mit 

 Lebensbild B. Schwalbes von E. SCHWALBE; with 13 plates (mostly folding and linen- mounted), 

 8vo. buckram, 4s (p. M. 7) Braunschweig, 1904 



16912 SECCHI (Angelo, s.J. ; Prof. Physics, Washington : Director, Osservatorio del Collegia 

 Romano) Die STERNE : Grundziige der 'Astronomic der Fixsterne ; with 9 plates (some coloured), 

 and 78 woodcuts, post 8vo. hf. black calf neat, 4s Qd (p. M. 8 sewn) Leipzig, 1878 



16913 SEELIGER (Hugo v. ; Director, Munich Observatory) BETRACHTUNGEN iiber die RAUM- 

 LICHE VERTHEILUNG der FIXSTERNE, 2 parts 4to. in 1, buckram, t. e. g., 4s Munchen, 1898-1909 



16914 VALENTINER (Wilhelm ; Prof. Astronomy, Heidelberg) HANDWORTERBUCH der ASTRO' 

 NOMIE, unter Mitwirkung von E. BECKER, E. GERLAND, M. HAID, N. HERZ, H. KOBOLD, N. v 

 KONKOLY, C. W. PETERS, E. v. REBEUR-PASCHWITZ, FR. RISTENPART, W. SCHUR, H. 

 SEELIGER, C. STECHERT, W. WISLICENUS und K. ZELLER; with 11 plates and 489 text-illustra- 

 tions, 4 vols. roy. 8vo. handsomely bound in hf. maroon morocco, cl. sides (FINE COPY), 2. 10s 

 (p. M. 100 sewn) Breslau, 1897-1902 



Forming part of the ' Encyklopadie der Naturwissenschaften.' 



16915 WATSON (James C., Univ. Michigan) THEORETICAL ASTRONOMY, relating to the Motions 

 of the Heavenly Bodies revolving around the Sun in Accordance with the Law of Universal 

 Gravitation, roy. 8vo. cl., 1. Is (p. 2. 5s) Philadelphia, 1869 



' A systematic derivation of the formulae for the calculation of the geocentric and heliocentric places, for the deter- 

 mination of the orbits of planets and comets, for the correction of approximate elements, and for the computation of 

 spherical perturbations, with the theory of the combination of observations and the method of least squares.' It is one 

 of the most valuable textbooks on mathematical astronomy. 



The author believed he had discovered the spurious intramercurian planet ' Vulcan ' as the result of his observations 

 during the total solar eclirse of July 29, 1878. 



16916 WEBB (Thomas William, pr., F.R.A.S.) CELESTIAL OBJECTS for COMMON TELESCOPES, 5th 

 Edition, revised and greatly enlarged, by THOMAS HENRY ESPINELL COMPTON ESPIN, Vicar of 

 Tow Law, F.R.A.S., with fine portrait, plates, and woodcuts, 2 vols. post 8vo. cl., 6s Qd (p. 13s) 1893 4 



' A work which has done more than any other to advance the cause of amateur observation.' D. N. B. It is one of 

 the best books for the amateur astronomer " 



