XXIV 
Ln@ex 
Nature, 
October 7, 1915 



Apprenticeship and Skilled Employment Association, Report 
for 1914, 278 
Aqueous Hydrochloric 
F. D. Miles, 195 
Arabia Infelix; or, the Turks in Yamen, G. W. Bury, 209 
Arabic Meteorology, Ancient, 688; Arabic Weather Sayings, 
Some, Mohammad Bey Kasim, 688 
Arbitrary Functions, the Representation of, by Definite 
Integrals, W. B. Ford, 638 
Arboretum at Tortworth Court, the, W. J. Bean, 710 
Archzocyathine collected by Scottish National Antarctic 
Expedition, Dr. W. T. Gordon, 195 
Architectural Acoustics, Dr. W. C. Sabine, 45 
Aristotelian Society: British Psychological Society, and the 
Mind Association, Joint Meeting of, 433; Proceedings 
of the, new series, vol. xiv., 3 
Arithmetic: Arithmetic and Mensuration, Exercises in, 
P. Abbott, 392; a Shilling Arithmetic, W. M. Baker 
and A. A. Bourne, 558; the Pedagogy of Arithmetic, 
Dr. H. B. Howell, 62; Workshop Arithmetic, F. Castle, 
392; Arithmetical Processes of Involution and Evolu- 
tion, E. Chappell, 81 
a Rays, New Mechanical Effect of the, F. H. Glew, 627 
Army: Entrance Examination, 81; Army Worm, Cirphis 
unipuncta, A. Gibson, 603 
Artificial Limbs, E. Delorme, 167 
Ashgillian Succession, Dr. J. E. Marr, 83 
Asia, Eastern, Anthropological Research in, Dr. Hrdlitka, 
137 
Asphyxiants in Warfare, the Use of, 234 
Asphyxiating Gases: in Warfare, 267; Protection against, 
380 
Assam, Frontier Tribes of, Sir G. D. Dunbar, 96 
Assaying, Practical, a Text-book of, Prof. J. Park, 145 
Association of American Geographers, Address of Prof. 
A. P. Brigham, 154 
Astrographic Catalogue: Greenwich Section of the, 274; 
Perth (W.A.) Section, H. B. Curlewis, 601 
Acid, Electrical Conductivity of, 
ASTRONOMICAL NOTES. 
Comets : 
Metcalf’s Comet, 17; Mellish’s Comet, 46, 75, 99, 126, 
156, 184, 217, 241, 274, 301, 332, 462; Winnecke’s 
Comet, 99, 217; Tempel’s Comet, 99, 353, 462; 
Campbell’s Comet, 217; The Origin of Comets,. Prof. 
S. Strémgren and J. Braae, 493; Companions to 
Mellish’s Comet, 493 
Eclipses : 
Early Chinese Eclipses, K. Hirayama and S. Ogura, 218. 
Instruments : 
Canadian 72-inch Reflecting Telescope, Dr. J. S. Plaskett, 
17 
Meteors : 
Detonating Fireball in South Africa, 17; Meteors from 
Halley’s Comet, 300; The Meteor Season, W. F. 
Denning, 519; A Bright Meteor, July 17, 571; August 
Meteors, WF. Denning, 683; August Perseids, 712 
Observatories : 
Annual Report of Mount Wilson Solar Observatory, Prof. 
G. E. Hale, 75; Annual Report of Harvard College 
Observatory, Prof. E. C. Pickering, 100; Report of the 
Stonyhurst College Observatory, 126; The Paris Ob- 
servatory and its Work, Prof. G. A. Hill, 185 ; Demand 
for an Australian Solar Observatory, P. H. Baracchi, 
301; Observations at the Union Observatory, Johan- 
nesburg, 301; Report of the Kodaikanal and Madras 
Observatories, J. Evershed, 332; Report of the Bombay 
and Alibag Observatories, N. A. F. Moos, 405; 
Annual of the National Observatory of Rio de Janeiro, 
405; Report of the Cambridge Observatory, 1914—5, 
493; Work at the Lowell Observatory, 548; Report of 
the Oxford University Observatory, 601; The Harvard 
Observatory, Prof. Pickering; J.D.M., 628; The 
Detroit Observatory, 683; Control of Australian Ob- 
servatories, 713 
Planets : 
The Ninth Satellite of Jupiter, S. B. Nicholson, 126, 274; 
Measures of Saturn, Prof. P. Lowell, 156; The Planet 
Saturn, Abbé Th. Moreux, 185; The Satellites of 
Uranus, Prof. R. G. Aitken; Observations of Saturn, 
Prof. P. Lowell and E. C. Slipher, 353; Comparative 

Brightness of Venus and Sirius, H. Rey and C. Sola; 
S. Raurich, 519; Oxygen and Water on Mars, Prof. P. 
Lowell, 548; An Association for the Observation of 
Mars, Prof. W. H. Pickering, 628; Occultation of B 
Scorpii by Jupiter (1876), V. Ventosa, 684; The Figure 
of the Earth, Prof. W. de Sitter, 684; Meteorology of 
the Moon, Prof. W. H. Pickering, 684 
Stars: 
Structure of the Hy line in Stellar Spectra, Dr. A. 
Knatek, 99; A Gnomonic Star Atlas, R. K. Young, 
100; Relative Proper Motions of the Pleiades, Dr. R. 
Triimpler, 126; Stars with Variable Radial Velocities, 
R. E. Wilson, 156; R. F. Sanford, 157; Photographs 
of the Spectra of Nebule, Dr. V. M. Slipher, 185; 
The Constellations, G. Bigourdan, 218; Stellar Spectra, 
A. de Gramont, 218; Photographic Determinations of 
Stellar Parallax, A. van Maanen, 332; Measures of 
Southern Double Stars, Innes and Van der Spuy, 3543 
Measuring Heat from Stars, Dr. W. W. Coblentz, 354; 
Observations of Nebulz at the Helwan Observatory, 
H. K. Shaw, 381; Stars with Proper Motion exceeding 
o'50” annually, A. van Maanen, 381; Orbits of Variable 
Radial Velocity Stars, 382; Parallaxes of four Visual 
Binaries, F. Slocum, 405 ; Abnormal Variability of Mira 
Ceti, A. Bemporad, 405; Prof. A. A. Nijland, 405; 
Orbits of Eclipsing Binaries, Dr. H. Shapley, 462; 
The Nebulous Region near Omicron Persei, Prof. E. E. 
Barnard, 548; Cepheid-Geminid Variability, C. D. 
Perrine, 572; Wariable Stars, Dr. H. Shapley, 572; 
The Perth Observatory (W.A.) section of the Astro- 
graphic Catalogue, 601; The Scintillation of Stars, 
G. Bigourdan, 601; Absolute Scales of Photographic 
and Photovisual Magnitudes, F. A. Seares, 654; RT 
Persei and g Draconis, Dr. Dugan, 655; TV, TW, TX 
Cassiopeie and T Leonis Minoris, R. J. McDiarmid, 
655; Short Period Variable Stars, Von G. Hornig, 
655; R Corone Borealis, Prof. A. A. Nijland, 684; 
Proper Motions of the Stars by Stereoscope, J. Comas 
Sola, 713 
Sun: 
Anomalous Dispersion in the Sun, C. E. St. John, 17; 
E'ectrons in the Sun’s Atmosphere, Prof. H. Nagaoka, 
46; Sun-spot and Magnetic Activity, Prof. A. Wolfer, 
1913, 75; Solar Radiation Observations at Helwan 
Observatory, Eckersley, 157; Rotation of Solar Corona, 
J. Bosler, 217; Photographing the Solar Corona, E. B. 
Knobel, 301; The Spectrum of the Inner Corona, Dr. 
R. Furuhjelm, 353; Displacement of Enhanced Iron 
Lines at Centre of the Sun’s Disc, Dr. Evershed and 
N. Ayyar, 519; Meteorology of the Sun, Prof. W. G. 
Duffield, 655; Solar Vortices, Prof. G. E. Hale, 713; 
Vortex Motion, Prof. G. E. Hale and G. P. Luckey, 
713 
Miscellaneous : 
British Eclipse Expeditions, 1914, 46; Monthly Proceed- 
ings of the National Academy of Sciences of the 
U.S.A., 46; Grundspectra of Alkali and Alkaline Earth 
Metals, E. H. Nelthorpe, 46; Annuaire Astronomique 
et Météorologiqive, 1915, 76: The Chromospheric 
Spectrum without an Eclipse, W. S. Adams and C. G. 
Burwell, 185; Examination of Mirrors and Objectives, 
M. Bigourdan. 218; Annual of the Bureau des Longi- 
tudes, 1915, 218; Astronomy and the War, 242; Electric 
Furnace Spectra of Vanadium and Chromium, Dr. 
A. S. King, 242; Astrononusche Nachrichten, 242, 
274; Gazette Astronomique, 242; Report of the Astro- 
nomical Section of the Hampstead Scientific Society, 
332; Spectroscopic Analysis of the N‘Kandhla and 
other Meteoric Irons, Dr. J. Lunt, 354; Journal of the 
Manchester Astronomical Society, 382; Behaviour of 
Spectrum Lines ct the same Series, Dr. Royds, 437; 
The Fisher, Polk County, Minn., Meteorite, Prof. 
G. P. Merrill, 437; Report of the Nantucket Maria 
Mitchell Association, 437; Bulletins of the Astronomical 
Society of France, 437; The Variation of Latitude 
during 1914’0-1915"0, Prof. Albrecht, 462; The Society 
for Practical Astronomy, 462; The Henry Draper 
Memorial, 493; The Aberration Constant and Latitude 
Variation, H. S. Jones, 493; Causes of Changes in the 
rate of a Watch, J. J. Shaw, 519; The Structure of 
the Universe, H. Spencer Jones, 548; The Photograph 
in Astronomy, E. C. Slipher, 548; The Determination 
