ratute. "| 



Index 



John Aitken, 228; Further Observalions of llalley's 

 Comet, Michie Smith and John Evershed, 374 ; C. D. 

 Perrine, 374; Velocities and Accelerations of the Ejecta 

 from Halley's Comet, Profs. Barnard and Lowell, 404; 

 J. Comas Sola, 404; Time of the Solar Transit of 

 llalley's Comet, 472; Death of Prof. G. V. Schiaparelli, 

 14; Obituary Notice of, 44; Our Astronomical Column, 

 19, 52, 86, 120, 152, 183, 213, 248, 272, 317, 344, 374, 

 404, 438, 472, 507, 544 ; Astronomical Occurrences in 

 July, 19 ; in August, 120 ; in September, 272 ; in 

 October, 438; Ephemeris for Comet igion, Prof. 

 Kobold, tg ; Prof. Barnard, 19 ; Observations of Comet 

 1910a, Dr. Karl Bohlin, 272 ; Prof. Ricco, 472 ; Photo- 

 graphs of Morehouse's Comet, Messrs. Hirayama and 

 Toda, 19 ; the Determination of Position near the Poles, 

 Mr. Hinks, 19 ; the Variation of Latitude, Prof. 

 .\lbrecht, 20; New Canals and Lakes on Mars, M. 

 Jonckheere, 20 ; Subjective Phenomena on Mars, M. 

 .\ntoniadi, 120; Mars in 1909 as seen at the Lowell 

 Observatory, Prof. Percival Lowell, 172 ; Water \'apour 

 on Mars, Prof. Campbell, 317; Prof. Frank W. Very, 

 4C15 ; a Suggested Volcanic Origin of Martian Features, 

 Dr. W'ilhelm Krebs, 344 ; International Union for Co- 

 operation in Solar Research, 22 ; Prof. Arthur Schuster, 

 F.R.S., 463, Death and Obituarv Notice of Prof. }. G. 

 Galle, 45 ; Death of Prof. T. Zona, 46 ; Death of Dr. 

 Wilhelm Winkler, 47 ; Prevention of Dew Deposits 

 upon Lens Surfaces, Franklin Adams, 52 ; a Variable 

 Star as a Time Constant, Prof. Barnard, 52 ; Radiation 

 and Absorption, Prof. Humphrevj, 52; an Interesting 

 Occultation, -Arthur Burnett, 73 ; the Next Total Eclipsr 

 of the Sun, Dr. William J. -S. Lockyer, 75 ; the Total 

 Solar Eclipse, May 9, iqio. Dr. William J. S. Lockyer, 

 113; the Total Solar Eclipse of April 28, 1911, Dr. Pio 

 Emanuelli, 172 ; Harvard College Observatory, Prof. 

 E. C. Pickeiing, 86; Photographs of Auror:e, Carl 

 Stormer, 86 ; Displacement of Spectral Lines at the 

 Sun's Limb, A Perot, 86; the Pressure of Light on 

 Gases, Dr. Lebedew, 86 ; the Determination of Stellar 

 Radial Velocities, Prof. Frost, 86; Prof. R. W. Wood, 

 86; the Evolution of Worlds, Prof. Percival Lowell, 

 William E. Rolston, gq ; Present Meteoric Displays. 

 W. F. Denning, 105; Death of J. Ellard Gore, iiii; 

 the Genesis of \'arious Lunar Features, M. Puiseux, 

 120; the Gnomon in Ancient Astronomy, Jules Sagaret, 

 120; the Leeds .Astronomical Society, 120; a Central 

 Bureau for Meteor Observations, 152 ; the Rotation of 

 Sun-spots, P. Kempf, 152 ; Large Meteorites, Edmund 

 O. Hovey, 152 ; the United States Naval Observatory. 

 152 ; Measures of Double Stars, Prof. Burnham, 152 ; 

 Dr. Lau, 317; Mr. Sellers, 507; the Study of Double 

 Stars for .Amateurs, G. F. Chambers, 273 ; Popular 

 Astronomy, Prof. Simon Newcomb, 171 ; Photographs 

 of Nebula', Dr. Ritchey, 183 ; the Accurate Measure- 

 ment of Photographs, Prof. E. C. Pickering, 184 ; 

 Observations of Perseids in 1909, S. Beljawsky, 1S4; 

 Results from Micrometric Observations of Eros, 1900, 

 Mr. Hinks, 184 ; Occultation of t, Gemini by the Planet 

 Venus. M. Antoniadi, F. Baldet, and F. Qu(5nisset, 

 196 ; the Recent Occultation of tj Geminorum by Venus, 

 ^I.M. Baldet, Ou^nisset, and Antoniadi, 317; Occulta- 

 tion of 7j Geminorum by Venus, July 26, observed at 

 Lyons, J. Guillaume and J. Merlin, 390; Discovery of 

 a .SiTiall Planet, presumably New, Jos6 Comas Sola, 

 196; Perseid Meteoric Shower, igio, W. F. Denning, 

 204, 248; C. L. Brook, 248; W. H. Steavenson, 24S ; 

 Miss Warner, 248; D. E. Packer, 248; W. Johnson, 

 248; E. F. Sawyer, 439; Brilliant Meteor of July 31, 

 Father A. L. Cortie, 204; a New Comet, Rev. J. H. 

 Metcalf, 213; Mr. Burton, 213; Metcalf's Comet, 19106, 

 249, 273; M. Guillaume, 249; Dr. Kobold, 249, 344, 

 507 ; Prof. Pickering, 344 ; M. Qu^nisset, 507 ; Observa- 

 tions of -Metcalf's Comet, J. Guillaume, 261 ; Observa- 

 tions of the Comet igioh (Metcalf), -August 9, igio, 

 M- Coggia, 261 ; Observations of Metcalf's Comet, 

 iqioft, M. Borrelly, 261 ; M. Schaumasse, 292 ; Observa- 

 tions of Metcalf's Comet made at the Paris Observatory, 

 J. Chatelu, 261 ; Properties of the Polar Filaments of 

 the Sun, H. Dcslandres, 228; Photographs of Daniel's 

 Comet, igo7(i. Prof. Barnard, 249 ; Precession and the 

 Solar Motion, Prof. Boss, 249 ; Calcium Vapour in the 



Sun, C. E. St. John, 249; Observations of Comets, 

 Dr. Ma.\ Wolf, 213; Observations of Mercury, G. and 

 V. Fournier, 213; M. Jarry-Desloges, 213; Dispersion 

 of Light in Interstellar Space, Herr Beljawsky, 213; 

 -Anomalous Scattering of Light, Dr. Julius, 214; the 

 Spiral Nebula M51 (Canum Venaticorum), Madame 

 Dorothea Isaac Roberts, 214; Supplement to the 

 " Astronomische Xachrichten," 214; the Paris Observa- 

 tory, M. Baillaud, 272; the Sun's A'elocity through 

 Space, Profs. Frost and Kapteyn, 272 ; Parallax of 

 Fourth-type Stars, Prof. Kapteyn, 273 ; the Maximum 

 of Mira in igog, Prof. Nijland, 273 ; Mr. Ichinohe, 

 273 ; Rediscovery of d'-Arrest's Comet (igioc), M. 

 Gonnessiat, 317; Observation of the d'-Arrest Comet at 

 the Observatory of Algiers, M. Gonnessiat, 324 ; M. 

 Baillaud, 324 ; Search-ephemerides for Comets i88q V. 

 (Brooks) and 1890 VII. (Spitaler), Dr. Bauschinger, 

 317; F. Hopfner, 317; the Sun-spots of igog. Dr. E. 

 Guerrieri, 317; the I^ermanent International Conmiittee 

 for the "Carte du Ciel," 317; Meteors and Bolides, 

 Prof. Guido Cora, 317; History of Navigation, Prof. 

 Marguet, 317; Meteoric Fireballs, Rev. W. F. .A. 

 Ellison, 318; Rev. J. C. W. Herschel, 318; a Suspected 

 New Planet, Prof. J. Comas Sola, 344; Definitive 

 Elements for Comet 1852 IV., -Adolf Hnatek, 344; the 

 Passage of the Earth through the Tail of the 1861 

 Comet, R. Baer, 344; the Spectrum of Cyanogen, 

 Comte de Gramont and M. Drecq, 344; Researches on 

 the Colours of Stars, Osten Bergstrand, 344; "Mock 

 Suns," James F. Ronca, 345; " Mock Suns " at East- 

 bourne, Mrs. -A. M. Butler, 374; -Astronomy in India, 

 374; an Oblique Belt on Jupiter, Scriven Bolton, 362; 

 the Distances of Red Stars, Dr- H. Norris Russell, 374 ; 

 -Astronomy : a Handy Manual for Students and Others, 

 Prof. F. W. Dyson, F.R.S., 393 ; Chats about -Astro- 

 nomy, H. P. Hollis, 393 ; Observations of Comets, M. 

 Gonnessiat, 404; Mr. Innes, 404; the Solar Physics 

 Observatory, South Kensington, 404 ; the Determination 

 of Longitude, Dr. Jean Mascart, 404 ; Transactions of 

 the -Astronomical Observatory of Yale University, 

 Parallax Investigations on Thirty-five Selected Stars by 

 Frederick L. Chase, Mason F. Smith, and William L. 

 Elkin, 433 ; a Bright Meteor, 43S ; Rediscovery of 

 Brooks's Periodical Comet (i88g V.), igiorf, Messrs. 

 -Aitken and Wilson, ^ifi ; the Luminosity of Comets, 

 W. L. Dudley, 439 ; Coloured Stars between the Pole 

 and 60° N. Declination, Herr Kriiger, 43g ; Observations 

 of the Companion of .Sirius, Prof. Barnard, 439 ; a 

 Modified Method for Nadir Observations, R. M. Stewart, 

 43g ; a New Micrometer, Dr. Doberck, 43g ; the Mean 

 Parallax of Tenth-magnitude Stars, Dr. H. E. Lau, 

 439 ; Halley Meteors, Prof. David Todd, 439 ; .Announce- 

 ment of a Nova, Mrs. Fleming. 472 ; Arabian -Astro- 

 nomical Instruments, Prof. E. Wiedemann, 472 ; New 

 F.phemerides for Saturn, Uranus, and Neptune. Dr 

 Downing, 472 ; a Bright Projection on Saturn, M. 

 Maggini, 507; Origin of Cometary Bodies and Saturn's 

 Rings, Dr. Henry Wile, 522 ; Irregularities in the Motion 

 of -Algol's Satellite, Enzo Mora, 472 ; the Cambridge 

 Observatory, Sir Robert Ball, 472 ; Prof- Newall, 472 ; 

 Observations of Neptune's Satellite, Prof. Barnard, 472 ; 

 Spectrum and Radial Velocity of ^ Persei, Dr. Luden- 

 dorff, 507 ; Death and Obituary Notice of Thorvald 

 Nicoiai Thiele, 503 ; Comets and Electrons, Prof. Righi, 

 307 ; Recent Results in Solar Physics, Prof. Riccu. 507 ; 

 the Amateur Astronomer, Gideon Riegler, W. E. 

 Rolston, 526; a Brilliant Meteor on October 23, W. F. 

 Denning, .^44; J. E. Clark, ,S44 : Simultaneous Photo- 

 graphic Observations of a Remarkable Meteor. Herr 

 .Svkora, 544 ; Two Remarkable Prominences, Dr. F 

 Slocum, 544 ; tile Relations between Solar and Terres- 

 trial Phenomena, .Abbd Th. Moreux, ■;45 ; Search- 

 ephemerides for Westphal's Comet, 1852 I\ ., .\. 

 Hnatek, 545 



Astrophvsics : the Pressure of Light on Gases, Dr. Lebedew, 

 86 



.Atkins (W. R. G.), Cryoscopic Determination of the Os- 

 motic Pressure in Some Plant Organs, 211 



Atlas, an Economic, J. G. Bartholomew. 426 



-Atlases, a List of Geographical, in the Library of Congress, 

 with Bibliographical Notes, yi^ 



6 



