KNOWLEDGE 



INDEX. 



bis "Popular 



Abbe, Cleveland — 



Distribution of Nebulas witb respect to the 

 Milky Way 



Absorption — 



Evidence of Absorption of Light in Space ... 



Airy, Sir G. B.— 



Notice of new etlition of 

 Astronomy" 



America— 



Origin of the Name America 



Ames, J. S.— 



Notice of bis paper " On the Rhythmical 

 Group of Hydrogen Lines " 



Aragonite — 



Frequently replaced by Calcite in Fossil 

 Shells 



Arcturus — 



On the proper Motion and actual Magnitude of 



Atmosphere — 



Height of the Solar Atmosphere 

 Height of the Earth's Atmosphere 



Backhouse, T. W.— 



On the Magnitude of Canopus 



Ball, Piatt— 



Notice of his book, " Are the Effects of Use 

 and Disuse Inherited '? " 



Balloons- 

 Photographs taken from 



Balmer, J. J. — 



His Formula connecting the Positions 

 the Hydrogen Lines 



Barnard, E. E. — 



His I'liotograph of the Sagittarius Region 



On the Comparison of Photographs of the 



Milky Way 



Barrett, T. S.— 



Letter on Magic Squares 

 Letter on Recurring Decimals 

 Article on the ^lagic Square of Four 

 Letters on the Magic Square of Four 



of 



156 

 155 



171 

 224 



170 



68 

 21 



28 

 214 



212 



12 

 212 



170 



The Factorials of High Numbers 



50, 232 



93 



16 



17 



45 



15(5 



210 



71, 



Beynon, Richard — 



International Yachting ... ... ... 183 



Explosions on Petroleum Vessels .. ... 233 



Boeddicker, Dr.— 



His Drawing of the Milky Way ... ... 93 



Boys, Prof. C. Y.— 



Soap Bubbles and the Forces which Mould 

 them 110 



Buckland, Miss A. W. — 



Our invisible Foes ; or Bacteria in Agriculture 75 



Buckton, G. B.— 



Monograph of the British Cicadaj Ill 



Burnham, S. W.— 



Note on the Orbit of the Double Star 2)2 ... 48 

 His Selection of the Site of the Lick 

 Observatory ... ... ... ... ... 31 



The Companion to a Ursre Majoris (jS 1077) 129 



Butler, E. A.— 



The Book-louse ... ... . 3 



The Silver-fish Insect ... ... . 25 



The House Cricket 82 



Gnats, Midges and Mosquitos 121, 141, 161 



Earwigs 181,201 



On Human Pediculi 221 



Calendar — 



The Day of the Week for any Date 47, 70, 94, 133 



California — 



Observatories in ... ... 31 



Chambers, G. F.— 



Notice of his " Pictorial .\strouomy " ... 171 



Chartres, R. — 



Letter on Recurring Decimals ... .. 30 



Letter on the Attraction of a Thin Shell ... 134 



Christie, R. W. D. 



Rule for finding the Day of the Week for any 



Date ... .". 30 



Letter on Perpetual Calendars ... 94 



Christopher, H.— 



On the Cause of Volcanic .\ctiou ... .. 131 



