IV, 



KNOWLEDGE 



Gierke, Miss Ellen M.— 



Notice of her book, " Jupiter and bis System" 211 



Comets— 



Periodical Comets due in 1892 



71 



Comets' Tails — 



On the Forms of Comets' Tails; by A. C. 

 Kanyabd ... ■■• ••• ••• •■■ '^'^'-^ 



Comet, Swift's— 



Photographs of; by Prof. E. E. B.uiNARD ... 229 



Cooke, Dr. M. C— 



Notice of his book, " Vegetable Wasps and 

 Plant Worms" 234 



Cornish, Yaughan— 



The Chemical Element Carbon 25 



Chemical Kesearches of Jean Servais Stas . 74 

 The Classification of the Chemical Elements H4 

 Article on rhosjihorun Mirabilis 

 Some Facts about Explosives... 

 The Liquefaction of Gases ... 

 The Fuel of the Blast Furnace 

 Bye-Products n-niis Waste-Products... 



Espin, The Rev. T. E.— 



On the Wolf-Eayet Stars in Dr. Max Wolf's 

 Photographs of the y Cygni Eegion ... 14 



Letter on the Monochromatic Spectrum of 

 the Nova Aurigse in August, 1802 170 



Explosives- 

 Some Facts about Explosives ; by Vaughan 



CoKNISH ... ... ... ... ... 1 l:i() 



Faculse — 



Photographs of Solar Faculse ; by Prof. G. E. 



Hale 169 



Fishes — 



The Oldest Fishes and their Fins ; by B. 

 Lydekker ... ... ... ... ... 1 73 



Flint- 



Corona — 



The Corona of the Sun and Stars ... 115 



Crawshay, George — 



On the Cause of Earthquakes 71 



Currents — 



Of the North Atlantic; by E. Beynox 155 



Dark Nebulae — 



Letter on Dark Nebulous Masses ; by T. W. 

 Backhouse ... ... ... .-• 03 



Dark Tree-like Structure — 



In the Milky Way ; photographed by Dr. 

 Max Wolf 192 



Density — 



Evidence as to the Density of the Orion and 

 other Nebulie .. 192 



Earthquakes — 



The Great Earthquake in Japan of 1891 ; 



paper by the Eev. H. N. Hutchinson ... 88 

 On the Cause of 18,71,145 



Edridge-Green, Dr. F. W.— 



Notice of his book on " Memory : Its logical 

 Eelations and Cultivation " ... ... 35 



A Flake of, and its History ; by E. Lydekker 195 

 Fry, The Rt. Hon. Lord Justice— 



107 

 136 



iy3 Galactic System — 



A Cluster principally composed of Stars givin;;' 

 the ■ Sirian type of Spectrum. Note by 

 A. C. Eanyakd ... ... ... 49 



British Mosses ... 



The Disaster at St. Gervais ... 



4, 21, 41, 61 

 ... 201 



208 



Elements — 



Classification of the Chemical Elements 



84 



Gases— 



On the Liquefaction of Gases ; by VAVftHAx 

 Cornish ... ... ... ... .. 141 



Glacial Period — 



The cause of ... ... ... ... 1,84,52 



Glacier- 

 Photographs of the Holes in the Tetes Eousses 

 Glacier, the origin of the St. Gervais 

 Disaster ... ... ... ... ... 201 



Glacier Motion — 



Paper on theories of; by the Eev. H. N. 

 Hutchinson ... . ... ... 66 



Glew, F. H.— 



On the interval between Successive Flashes 

 of Lightning ... ... ... ... 150 



Gore, J. E.— 



The Relative Brightness of the Planets ... 35 



Grasses — 



By J. Pentlanu Smith ... .. ... 185 



Grover, C— 



Letter as to the Nebulosity occasionally observ- 

 able around Variable Stars ... .. 115 



Hale, Prof. Geo. E.— 



Photographs of Solar Facula? and Prominences 169 



Elephants — 



Eecent and Extinct Elephants; by .1!. 

 Lydekker ... ... .. ... 46,64 



Henry, MM. Paul and Prosper - 



Photographs of the Moon by 



50 



