KNOWLEDGE 



Comets — 



Dr. Hock's Papers with respect to Groups of 42 

 A. C. Eauyard on Velocities of Approach of 42, 67 

 On the Origin and Motions of Comets, by W. 

 II. S. Monck 219 



Common, A. A. — 



Slu-tc-hes of tlie Nebula in the Pleiades ... 68 

 I'hotograph.s of the Orion Nebula ... ... 146 



Copeland, Dr. Ralph — 



Appointnient as Astronomer Eoval for Scot- 

 land * 67 



Coral Reefs — 



The Formation of, by W. H. Wesley .. 4 



Corona — 



On a Great Branching Structure in the Corona 



of August 29, 1886, by A. C. Rauyard ... is 

 Corona Photographed during Eclipse of 1.SH9, 



•Tan. 1 10,5 



Crookes, W. — 



(iift of Radiometers to the South Kensington 



Museum ... 40 



Cross- Pert III sat Ion — 



Of wheat 65 



Crouch, Archer P. — 



Notice of his book entitled " Glimpses of 

 Feverlaud ' . . . ... ... ... ... 1 50 



Curtis, H. P.— 



Collection of Photographs of Tornadoes . . . 225 

 An Account of a Tornado ... ... ... 227 



Darwin Prof. George — 



NVitice of article on Saturn and his Rmg 

 System ... ... ... ... ... 17;-! 



Davis, E. — 



Notice of book entitled " Practical ilicro- 



'^copy' 149 



Day, R. Camper 



Waves of Electricity ... ... ... ... 81 



The Head of a Bee" 142 



On Lightning Rods 220 



The Dragon Tree of Tenerife ... ... 237 



Detective Cameras ... 94 



Dines, W. K.— 



Connection between Pressure and \'elocity 



of the Wind .". 173 



Draper, Dr. Henry — 



ilemorial to ... ... ... ... ... 7 



Self-recording P>arometer and Rain-Gauge of 58 

 Drayson, A. W., Major-General— 



Notice of liis book entitled " Thirty Thousand 

 Years of the Earth's Past History" ... 150 



Dust Storms — 



^'c Paper on Tornadoes ... ... ... 225 



Eclipse — 



Total Solar Eclipse 1880. August 26, l)y A. C. 

 Ranyard ... ... ... ... ... ih 



Total Solar Echpse of 1889, -January 1, by 

 A. C. Ranyard ... ... ... ... 105 



Prof. W. H. Pickering's photograph taken 

 during the Eclipse of 1889, January 1 .. 16s 

 Examinations— 



The ICtfects of Competitive Examinations ... 7 



Opinions of De JNlorgan, Dr. Whewell, and Sir 

 John Hersehel on . . . ... ... ... s 



Fairies — 



Of France, Italy, and Spain, by Mary Proctor 20 



North American ln(han Fairy-Lore ... ... 107 



Field, A. J.— 



Notes on the Spotted Salamander 60 



The Common Adder ... ... ... ... 82 



Letter on E.xperimeuts on Snake Bites ... 109 



On Bats 122 



Letter on Vivisection ... ... ... ... 1 28 



The Cries of Frogs 152 



Does the Female Viper swallow its Young ? 248 



Finley, Lieut, J. P. — 



Geographical Distribution of Tornadoes in 

 the United States 227 



Fitzgerald, M. — 



Observation of Ball Lightning ... ... 1()7 



Fogs— 



Dr. Marcet on London Fogs ... ... ... 90 



Frogs — 



The Cries of Frogs. Letters signed " Twenty- 

 .seven Y'ears in India" and "A. J. 



Field" 151. 152 



Gattle, W. Montagu 



Articles on Whist in each number. 

 Geology — 



Institutions where Geology is taught... ... 18 



Scientific Societies founded for the Study of 

 Geology ... ... ... ... ... 14 



Gibson, .sir Westby-Gibson. 

 Gold — 



The Occurrence of ... ... ... ... 163 



Gore, John Ellard — 



Notice of his book entitled " Planetary and 



Stellar Studies " " ... 112 



Gravity — 



On the Universal Action of. by R. A. Proctor 27 

 Green, N. E. — 



Mis Drawings of Jupiter ... ... 194 



Gremli — 



Notice of Translation of Grenili's " F'lora of 

 Switzerland" ... ... ... ... 228 



Grimthorpe, Lord — 



On ;\lr. luwards's Compensating Pendulum... 64 

 Gunsberg, J. iMephisto) — 



.\rticles on Chess in each number. 

 Hall, Maxwell — 



The Sun's ^lotion in Space ... ... ... 120 



Hansard, Arnold G. — 



An rndeeipherable Cipher ... ... ... 87 



Harrison, W. Jerome, F.G.S. — 



(ieology in London ... ... ... ... 13 



A Photo-Geological Trip to the South Stacks 57 

 Hasluck, Paul N.— 



Notice of book entitled " The Mechanics' 

 Workshop Handybook " ... ... ... 28 



Hazel- 

 Article on Hazel and Filbert, by Grant Allen 49 

 Heron, Francis — 



Letter on Resemblance of Children to their 



Parents 211 



Hersehel, Sir John — 



Comparison of Moon's Brightness with 

 Sandstone Rock of Table Moimtam ... 24 



