INDEX OF VOLUMES I TO XX. 87 



N teS : VOL. PAGE 



Ked Color on Dried Codfish ; Death of Georgo B. Emerson ; Trawl- 

 ing; Fifty-first Meeting of the British Association (1881) ; Third 

 Meeting of the International Geographical Congress ; Microphonic 

 Concerts; Birds of Passage; Des Moines Field Club ; New Fossil 

 Bemains ; Tricycle driven by an Electro-Motor ; Appalachian 

 Mountain Club ; Deep Coal-Mine in England ; Fossil Kemains of 

 Men near Nice ; Absorption of Ueat by Walls ; Central Meteorolog- 

 ical Bureau of France xix 431 



Mound near Trenton, Missouri ; Death of G. Krefft ; Meeting of 

 International Geological Congress ; Spectroscopic Observations ; 

 Wind-Pressure ; Magnetic Survey of Missouri ; Expansion of Metals 

 in passing from the Liquid to the Solid State; Ignition by Nitric 

 Acid; Temperature of the Human Body; Edinburgh Sunday Sci- 

 ence School ; Pictet's Ice-Machines ; Johns Hopkins Biological 

 Laboratory; Death of R. C. Gunn; Mercadier's Photophonic Re- 

 searches ; Death of John Blackwall ; Toad-Market in Paris ; Inter- 

 national Medical and Sanitary Exhibition ; Meeting of French As- 

 sociation for the Advancement of Science xix 575 



Rood's Improvement of the Sprengel Pump ; A Correction ; Center 

 of Population in the United States ; Death of J. F. McLennan ; 

 Susceptibility of Spiders to Music; Deterioration of the English 

 People ; Rumford Medal to J. W. Gibbs; Death of Sir Josiah Ma- 

 son ; Prize to M. de Bisschop ; French Museum of Ethnography ; 

 Increase of Danger from Lightning; Death of George Rolleston ; 

 Carbonic Acid and Red-hot Stoves ; Tube-constructing Spider ; 

 Atomic Weight of Aluminum xix 719 



Microscopical Study of Iron-Ore; Humble-Bees in New Zealand; 

 Reduction of Working-Hours of Railroad Employees; French Mag- 

 netic Station at Cape Horn; Uniformity in Mathematical Notation; 

 Fifty-fourth Meeting of the German Association of Naturalists and 

 Physicians ; Death of M. J. Schleiden ; Vaccination as a Protection 

 against Carbonaceous Diseases; Explosiveness of Coal-Dust. . . . xix 864 



Plant-Diseases and Bacteria ; Power of Imitation in Birds ; Corrup- 

 tion of Names ; Ground-ice ; Spread of the English Language ; 

 Smithson ; Salicylic Acid ; Effect of Inhalation of Oxygen ; Syn- 

 thesis of Ammonia ; Fascination of Birds by Snakes ; Bessemer 

 Process applied to Copper ; French Commission on the Hygiene of 

 Eyes in Schools ; New Treatment of Diphtheria ; Effect of Intel- 

 lectual Work upon Cerebral Circulation xx 143 



Improved Index ; Death of J. M. Hildebrandt ; Election of M. de 

 Lesseps President of the French Geographical Society ; Death of 

 John Duncan ; Death of H. C. Watson ; Influence of Music on the 

 Circulation ; Death of F. Kellar ; Death of M. Dubrunfaut xx 288 



Increase of Entomologists ; Appointment of M. Wurtz Life-Senator; 

 Stone Implements; School Discipline; "Manuscript Troano " ; 

 Pollination of Yucca ; Density of the Liquefied Gases ; Effect of 

 Tincture of Ergot of Rye ; Musical Sand ; Electrical Paper ; En- 

 demic Goitre; The Canidse ; Measurement of the Velocity of 

 Light; New Construction of Vessels to increase the Speed; Elec- 

 trical Resistance of Carbon ; The African Interior Sea Project; 

 Photographs of Nebula? ; Coloring-Matter of the Medusas; Metro- 



