INDEX. 



ULTRA-MICROSCOPIC METHODS IN 

 BOTANY, DARK-GROUND ILLU- 

 MINATION AND, 361 



Ultra-Neptunian planet, The existence of 

 an, 171 



planets, 218 



Units, Names for the, 265 



, Stellar distance, 298, 334 



VALLEYS, THE STREAMLESS DOWNS 



AND THEIR DRY, 281 

 Vapour lamp, The mercury, 314 

 Variable stars, The nomenclature of, 421 

 Vegetation, Effect of tarred roads upon, 



267 



of Japan, 180 



Natal, 265 



Velocities of fainter stars, Determination 



of radial, 460 

 Vesta, The Path of, 317 

 Vincent, J. H. F 326 



Volcanic dust and climatic changes, 433 

 Volcanoes, Quantitative study in active, 



220 

 Volunteers for observation of variable 



stars. Appeal for more, 306 



WALES, TORNADO IN, 465 

 Wallace, The late Alfred Russel, 456 

 Warbler in Ireland, The Dartford, 24 



Water on lead, Action of alkaline. 4(13 



, plants, Biology of submerged, 345 



tank, Calcite crystals from a, 464 



, Testing for " Hypo " in mounts, 



prints, and washing, 466 

 , Use of copper sulphate for purifying, 



101 

 Waters, In very deep, 394 

 Waves, Electric, 81 

 Weather, Aeroplanes and, 387 



forecast, Harvest, 221 



maps for the Northern Hemisphere, 



Daily, 433 

 Webb, Wilfred Mark, 24, 105, 149, 244, 



274, 343 

 Weeds of arable land, 144 

 Wells, London, 183 

 West Indies, Hurricanes of the, 309 

 Westphal's Comet, 425 

 Whale, Functional teeth in upper jaw of 



sperm, 314 

 Wheat berry. The influence of age on the 



vitality and chemical composition of 



the, 85, 135 

 Whymper, R., 85, 135 

 Wiggins, Tressillian, P., 114 

 Wild duck, Reproductive disharmony in, 



187 

 Williams, W. P., 252 

 Wilson, S. A., 318 



Fiammetta, 318 



Wind and tree growth, 144 



Winds in the free air, 269 



Wireless signals, Effect of atmospheric 



conditions on, 466 

 Withershins, Withy winds and, 175 

 Withy winds and withershins, 175 

 Wood, H. E., 439 

 •— , Mrs., 459 



Woodland succession, Climate change and, 



218 

 Worlds to conquer, Fresh, 459 



X 3 ?, 313 



, Neon and, 435 



X-radiation, The nature of, 378 

 X-rays, Crystals and, 185 

 , Fabrics opaque to, 61 



YERKES' PARALLAX DETERMINA- 

 TIONS, 425 



Yorkshire and Nottinghamshire, The con- 

 cealed coalfield of, 268 



Yule, G. Udny, 141 



ZIRCONIUM, STUDIES OF THE 



ELEMENT, 267 

 Zodiacal light, The, 323 

 Zoological Society's menagerie, Additions 



to the, 282 

 Zoology Notes, 26, 67, 107, 152, 187, 224, 



275 314. 353, 392, 435, 468 



Printed for the Proprietors (Knowledge Publishing Company, Limited), by John King, Ealing and Uxbridge. 



