Nature, Index Vil 
June 9, 1904 
Arnold (Prof. J. O.), Hardening, Tempering, Annealing 
and Forging of Steel, Joseph V. Woodworth, 124; Micro- 
scopic Analysis of Metals, Floris Osmond, 553 
Arnold (Ralph), Palwontology and Stratigraphy of the 
Marine Pliocene and Pleistocene of San Pedro, Cali- 
fornia, 266 
Arrow (G. J.), a Remarkable Kind of Variability in Beetles 
of the Trogid Genus Acanthocerus, 165 
Arsandaux (H.), Geological Constitution of the Massif of 
Khakhadian, 576 
Arsonval (M. d’), New Electrical Device for Extinguishing 
the High Frequency Arc, 383; Protective Arrangements 
for Electrical Machines Supplying High Frequency 
Generators, 383 
Ashford (C. E.), Electricity and Magnetism, 243 
Ashmolean Natural History Society of Oxfordshire : Oxford 
and Science, Prof. John Perry, F.R.S., 207, 269 
Ashworth (J. B.), y Rays from Radium, 295 
Asia and Tibet, Central, Sven Hedin, 225 
Assaying, Metallurgical Analysis and, W. A. Macleod and 
Charles Walker, 459 
Assyriology: the Devils and Evil Spirits of Babylonia, 
R. C. Thompson, 26 
Astronomy: Astronomischer Jahresbericht, Walter F. 
Wislicenus, 4; Solar and Magnetic Disturbances, Dr. 
Charles Chree, F.R.S., 6; Prof. A. Fowler, 6; Magnetic 
Storms, Aurorz and Solar Phenomena, Dr. William J. S. 
Lockyer, 9; Magnetic Disturbances and Sun-spots, 
F. Quénisset, 72; Solar Phenomena and Magnetic 
Storms, M. Quénisset, 90; Correspondence of Magnetic 
Storms with Solar Prominences, Dr. Lockyer, 95; the 
Relationship between Sun-spot Frequency and Terrestrial 
Magnetism, C. Chree, F.R.S., 525; the New Star in 
Gemini, Prof. H. H. Turner, 13; Was the New Star in 
Gemini Shining Previously as a very Faint Star? Prof. 
H. H. Turner, 43; the Formation of the Polar Caps on 
Mars, Percival Lowell, 16 ; Clouds on Mars, Mr. Denning, 
160; the ‘‘ Doubling’’ of the Martian Canals, E. M. 
Antoniadi, 185; Variations of the Martian Canals, Mr. 
Lowell, 496; the Certainty of a Future Life in Mars, 
Bradford Torrey Dodd, 221; Observed Changes on the 
Surface of Mars, Mr. Lowell, 399; Observations of Mars 
during 1903, W. I. Denning, 377; our Astronomical 
Column, 16, 37, 65, 90, 113, 137, 160, 185, 207, 233, 259, 
281, 305, 330, 350, 377, 399, 424, 446, 473, 496, 520, 
542, 508, 589, 620; Wolf’s Variable Star 59, 1903, Cygni, 
Prof. Pickering, 16; Prof. Wirtz, 16; Periodical Changes 
in the Colours of Jupiter’s Belts, Stanley Williams, 16; 
Observations of Jupiter, Ch. Lukacs, 90; Observations 
of the Planet Jupiter, W. F. Denning, 281, 476; the 
Multiple Tail of Comet 1903 c, Prof. Barnard, 16; Absorp- 
tion of Star Light by Comet 1903 c, Prof. Max Wolf, 114; 
the November Leonid Shower of 1903, 29, 521; W. F. 
Den ing, 29, 57, 446; John R. Henry, 80, 224; Alphonso 
Kifg, 105; M. Fiévez, 446; M. Terby, 446; the Late 
Leonid Meteor Shower, W. H. Milligan, 127; William 
E. Rolston, 127; Radiant Point of the, 331; Observy- 
ations of Leonids and Bielids at Athens, M. Eginitis, 186 ; 
Revision of Rowland’s Wave-lengths, Prof. Hartmann, 
37; Parallax of B Cassiopeia, S. Késtinksky, 38; 
Astronomy in Schools, W. W. Payne, 38; Bright Meteors, 
65; a Bright Meteor, Rowland Mott, 543; Search- 
ephemeris for Faye’s Comet, E. Strémgren, 65; 
the Secular Variation of Starlight, J. E. Gore, 65; Solar 
Observations at Lyons Observatory during 1902, J. 
Guillaume, 65; Astronomy for Everybody, a Popular Ex- 
position of the Wonders of the Heavens, Prof. Simon 
Newcomb, 75; the Forms of the Ring and Dumb-bell 
Nebulas, Prof. J. M. Schaeberle, 91 ; Royal Astronomical 
Society, 95, 190, 286, 503, 575; Method of Photograph- 
ing the Moon with the Surrounding Stars, Prof. Turner, 
95; Radiant Energy, a Working Power in the Mechanism 
of the Universe, R. W. O. Kestel, 101; Astronomical 
Occurrences in December, 1903, 113; in January, 1904, 
207; in February, 305; in March, 424; in April, 520; 
in May, 620; Determination of Standard Stellar Veloci- 
ties, Prof. Frost and Prof. Adams, 113; New Elements for 
n Aquilae, M. Luizet, 113; Publications of the Pulkowa 
Observatory, M. Nyren, 114; Guide for Astronomical and 
Geodetical Calculations, J. Boccardi, 114; Observations 
of Solar Phenomena, M. Deslandres, 137; the Spectrum 
of Lightning, Philip Fox, 137; Dr. W. J. S. Lockyer, 
137; the Line Spectra of the Alkaline Metals, H. Konen 
and A. Hagenbach, 137; the Total Solar Eclipse of May, 
1900, 160; Radial Velocities of B Aurige, G. A. Tikhoff, 
185; the Variable Star 1921, W Auriga, J. A. Parkhurst, 
234; Light changes of e« Aurige, H. Ludendorff, 305; 
Relative Star Density on Harvard Photographic Star 
Map, J. C. W. Herschel, 190; the January Meteors, 
W. F. Denning, 203; Ephemeris for Winnecke’s Comet, 
207; Spectrum of Mira Ceti, Joel Stebbins, 207; the 
Companion to the Observatory, 1904, 207; Astronomical 
Calendars for 1904, 233; Light Economy in Spectrum 
Photography, J. A. Humphreys, 234; Intensity of the 
Sun’s Light, Ch. Fabry, 234; the Luminous Intensity 
of the Star Vega, Charles Fabry, 239; on the Origin of 
Spiral Nebulas, Prof. J. M. Schaeberle, 248; Distribution 
of the Stars, 259; Report of the Windsor, N.S.W., 
Observatory, Mr. Tebbutt, 259; a  French-Chinese 
Calendar, 259; a Bright Bolide, W. E. Rolston, 259; 
Diminishing Size of the New Bishop’s Ring around the 
Sun, Henry Helm Clayton, 270; the Quadrantid Meteor 
Shower of 1904, John R. Henry, 272; Intensity of Atmo- 
spheric Lines in the Solar Spectrum, 281 ; Meridian Circle 
Observations of Eros and Nova Persei, John A. Dunne, 
282; Observed Motions in the Nova Persei Nebula, Prof. 
J. M. Schaeberle, 321; Nebulosity around Nova Persei, 
Otto Luyties, 589; Periodical Comets Due this Year, 
W. T. Lynn, 282; Variability of the Minor Planet Iris, 
Prof. Wendell, 305; Ephemeris for the Minor Planet (7) 
Iris, Dr. J. Riem, 377; Harvard Meridian Photometer 
Observations, Prof. Solon I. Bailey, 305; Fireballs in 
January, W. F. Denning, 310; Fireballs Visible in the 
Spring Months, W. F. Denning, 571; Guide du Calcu- 
lateur, J. Boccardi, 316; Death and Obituary Notice of 
Anna Winlock, 327; Peculiar Forms of Comets’ Tails, 
Prof. E. E. Barnard, 330; Actinic Quality of Sky-light, 
Gavin J. Burns, 330; the United States Naval Observ- 
atory, Captain C. M. Chester, 330; Coloured Haze around 
the Moon, Angus Rankin, 344; Comparison-star Photo- 
graphs for Minor Planets, &c., Prof. Max Wolf, 331; 
Report of the Harvard College Observatory, Prof. E. C. 
Pickering, 350; the Direct and Retrograde Rotations of 
the Planets, Prof. W. H. Pickering, 351; the ‘* invariable 
Plane ’’ of the Planetary System, Prof. T. J. J. See, 
351; Simultaneous Solar and Terrestrial Changes, Sir 
J. Norman Lockyer, K.C.B., F.R.S., 351; Diminution 
in the Intensity of the Solar Radiation during the Years 
1902 and 1903, Ladislas Gorczynski, 359; a Catalogue 
of 829 South Polar Stars, Prof. Harold Jacoby, 377; 
the Climatology of 1903, J. Loisel, 378; Meridian-circle 
Observations at the Lick Observatory, Richard H. 
Tucker, 378; Man’s Place in the Universe, Alfred R. 
Wallace, F.R.S., 389; Death of Prof. Callandreau, 396; 
Obituary Notice of, 441; the Geographical Distribution 
of Meteorites, Dr. O. C. Farrington, 399; an Atlas of 
Solar Photographs, Prof. Janssen, 399; Death of Henry 
Perrotin, 421; Obituary Notice of, 468; Variability of 
Minor Planets, Prof. Pickering and Prof. Wendell, 424; 
Observations of Venus during 1903, Percival Lowell, 424; 
Catalogue of New Double Stars, Prof. R. G. Aitken, 425 ; 
Double Star Observations, Prof. Doberck, 473; Prof. 
Burnham’s Measures of Double Stars, 496; Radial 
Velocities of Twenty Orion Stars, Messrs. Frost and 
Adams, 446; Catalogue of Long-period Variable Stars, 
Prof. Pickering, 446; the Distribution of Lines in Banded 
Spectra, M. Deslandres, 446; Sun-spot Variation in Lati- 
tude, 1861-1902, Dr. William J. S. Lockyer, 447; Sun- 
spots and Temperature, Alex. B. MacDowall, 607; Rapid 
Changes in a Sun-spot, Mr. Denning, 568; a Six Year 
Period for the Polar Motion, H. Kimura, 473; Correc- 
tions to the Berliner Jahrbuch Fundamental Catalogue, 
Dr. A. Auwers, 473; Cooperation in Solar Observations, 
Prof. Ricco, 473; Origin of Aurore, Ch. Nordmann, 
497; Astronomical Determination of Latitude and 
Azimuth, Prof. V. Reina, 497; Standard Velocity Stars, 
M. A. Belopolsky, 521; a New Form of Equatorial 
Mounting, Herr A. F. Lindemann, 521; Stars and 
Sextants, Messrs. Sprigge, Doak, Hudson and Cox, 
Commander Vansittart Howard, 532; Observations of 
Eros, Prof. E. E. Barnard, 542; Orbit of the Minor 
Planet Chicago (334), Prof. Kurt Laves, 542; Absorption 
