KNOWLEDGE 



Monck, W. H. S., M.A., F.R.A.S.- 



\'ariiiblc Stars ... ... ... ... 55 



The Masses, Brightness, and Distance of 



Double Stars ' 140 



Letter on Solar Spots and Variable Stars 150 



Distances of Double Stars ... ... ... 170 



On the Oiigin and Motions of Comets ... 219 



Mountain Observatories— 



On the Advantages of Jloimtain Stations for 

 Observatories ... ... ... 125 



Museums — 



Article on Old Museums, by W. E. Milliken 33 



Nebulae — 



The Nebula in the Pleiades 68 



The Great Nebula in Andromeda ... 75, 108, 206 

 The Great Nebula in Orion ... ... ... 145 



The Spectrum of the Orion Nebula ... 164 

 Photographs of Spiral Nebula' in Ursa 

 Major and Canes Venatici, and of the 

 Dumb-bell Nebula 188 



Newspapers — 



Statistics with reference to ... ... ... 104 



Niagara Falls— 



The rate at which they are rececUug ... ... 67 



Nicolls, G. W.— 



Insect Swarms in South America ... ... 170 



Nicolls, Arthur— 



The Disruptive Eflect of Lightning 238 



Nicotine — 



As a Disinfectant ... ... ... ... 51 



N itrates — 



Article on, by D. A. Louis 100 



Oliver (John Westwood) — 



Notice of his book entitled •• Astronomy for 

 Amateurs "... ... ... ... ... 112 



Pearse, Frederick T. (M.D., F.R.C.S.)— 



The Intlueuce of Certain Drugs on Physical 

 Strength and Endurance ... ... ... 132 



Peek, 0. E.— 



Variable Stars 86 



Nebulous Stars 126 



Pen-y-Van — 



The Enghsh Adder 234 



Phosphates— 



Their Influence on Physical Strength and 

 Endiu-ance. Dr. Pierce ... ... ... 182 



Phosphates as FertiUseis. D. A. Louis ... 181 

 Photographic Plates — 



Sensitive American Photographic Plates used 

 by the Brothers Henry ... ... ... 17 



Photographic Efficiency of Telescopes as re- 

 gards Faint Stars and Nebtda?. Prof. W. 



H. Pickering and A. C. Ranyard 247 



Pickering, Prof. W. A.— 



Notice of Observations of the Eclipse of 1899. 



•Ian. 1 77 



Letter on Photographs of the Orion Nebula . . . 191 

 Photographic Efficiency of Telescopes for 

 Stars and Nebulie ... ... ... ... 247 



Pincott, Frederic, M.R.A.S.— 



Aryan Speech Traced to the Stone Age ... 77 

 Pleiades— 



The NebiUa in the Pleiades. Article on, by 

 A. C. Eanyard ... ... ... ... 68 



Pocknell, Edward 



Letter on .\braham Sharp's Shorthand . 109 



Preyer, Prof. — 



On Life-restoring ... ... ... ... 21 



Proctor, R. A. — 



His last article on Plague and Pestilence ... 1 



Account of Mr. Proctor's death from the 



Ocala Banner ... ... ... ... 3 



Official report on the Autopsy on the Body of 



Mr. Proctor " ' ... 16 



Notice of book by, entitled " The Student's 

 Atlas in Twelve Circular Maps " ... ... 160 



On some Strange Feats of Calculating Boys 



8, 87, 63, 130 

 Danger from Lightning ... ... ... 11 



Star-born Meteors ... ... ... 14,188 



On the Universal Action of Gravitv ... ... 27 



On the Growth and Decay of Mmd ... 208, 230 

 On some Prmters' Pranks ... ... ... 251 



Proctor, Mrs. R. A. — 



Civil List Pension Granted to ... ... 102 



Proctor, Miss Mary — 



Fairies of France, Italy, and Spain .. .. 20 



North American Indian Fairy-Lore ... ... 107 



Ranyard, A. Cowper — 



The Effects of Competitive Examinations . . 7 

 On a Great Branching Structiu'e in the 



Corona of August 29," 1886 18 



How Comets come to us . ... ...42,67 



The Great Nebula in the Pleiades . ... 68 



Total Solar Eclipse of 1889 (.Ian. 1) 105 



Review of Abraham Sharp's Life and Corre- 

 spondence .. ... 110 

 On Mountain Observatories . 125 

 The Great Nebida in Orion ... 145 

 Prof. W. A. Pickering's Photograph of the 

 Corona taken diu-ing the Echpse of 1889 



(.Ian. 1) 168 



On Stars showing Large Parallax ... ... 171 



How Long does a Flash of Lighting last ? ... 177 



Photographs of Smaller NebiUie ... ... 188 



Mr. Isaac Roberts' Photograph of the Great 



Nebula in Anch'omeda ... ... ... 206 



On Tornadoes 225 



Brightness of Jupiter. Wilson's Theory of 



Sunspots ... ... ... ... ■■■ 233 



The jNIoon as seen in the Lick Telescope . . . 244 



Ranyard, A. C. and Marriott, W. — 



Article on Photographs of Lightning ... 165 



Reynolds, F. W.— 



A Jlethod of Ascertaining the Fimdamental 

 Colours ... ... ... ... •■■ 152 



Roberts, Isaac — 



Letter on Photographs of Orion Nebula ... 211 

 Photographs of Nebida in Pleiades ... ... 68 



NebiUa in Andromeda 75, 108, 206 



Nebula in Orion ... ... ... ■■ 145 



Photographs of Spiral Nebube in Ursa 

 ilajor, and Canes Venatici and of the Dumli- 

 beli Nebula 188 



Ross, Lieut.-Col. W. A.— 



Notice of book on " The Blowpipe in Che- 

 mistry. Mineralogy, and Geology ... ... 172 



Rosse, The Earl of — 



Measures of Heat radiated by the Moon . . 245 



