SCIENCE. 



Editorial Committee : S. Newcomb, Mathematics ; K. S. 'Woodward, llechanics ; E. C. Pickering, As- 

 tronomy ; T. C. Mexdenhall, Physics ; R. H. Thurston, Engineering ; Ira Remsen, Chemistry ; 

 Joseph Le Conte, Geology; W. 51. Davis, Physiography; O. C. Marsh, Paleontology; W. K. 

 Brooks, Inrertebrate Zoology ; C. Hart Merriam, Vertebrate Zoology ; N. L. Britton, 

 Botany ; Henry F. Osborn, General Biology ; H. P. Bowditch, Physiology ; 

 J. S. BiLLlXGS, Hygiene ; J. McKeex Caxteli,, Psychology ; 

 Baniel G. Brinton, J. W. Powell, Anthropology. 



Friday, April 26, 1895. 



CONTENTS: 



National Academy of Sciences 449 



Arthur Cayley : GEORGE BRUCE Halsted 450 



The Protolenus Fauna 453 



Volcanic Dust in Texas : H. W. TURNER 453 



Current Notes on Anthropology ( VI. ) ; D. G. Brin- 



TON 455 



Correspondence : — 457 



-4 Large Eetleclor for the Lick Obserralorg : Ed- 

 ward S. HOLDEN. 



Scientific Literature : — 457 



Alterniiting Generations : C. V. RiLEY. Gannftt\f 

 Manual of Topographic Methods: MANSFIELD 

 Merriman. Nordauh Degeneration: J. S. 

 Billings. Haycraft's Darwinism and Race 

 Progress : GEO. St. Clair. Venable's History of 

 Chemistry: "\V. A. NOYES. Orndorff's Erperi 

 ments in Organic Chemistry: FELIX Lexg- 

 FELD. 



Notes and Neios : — 470 



The Gold and Coal Resources of Alaska; A Red- 

 field Memorial; Clouds: The Discrimination of 

 Colors; The Karakoram Himalayas ; General. 



Societies atid Academies : — 473 



The Minnesota Academy of Natural Sciences; New 

 York Jlranch of the American Folk-Lore Society; 

 The Neir i'ork Mineralogical Club. 



Scientific Journals — 474 



Aslrophysical Journal : The Physical Rerieic. 

 Neto Books 476 



MS.«. intended for publication and books, etc.. intended 

 for review should be sent to the responsible editor, Prof. J. 

 McKeen Cattell, Garrison on Hudson, N. Y. 



Subscriptionsand advertisements should be sent to Science, 

 41 N. Queen St., Lancaster, Pa., or 41 East 49th St., New York. 



NATIONAL ACADEMY OF SCIENCES. 

 The National Academy of Sciences met at 

 Washington on April IG, 17, 18 and 19, 

 Profesaor O. C. ^Mai-sh, pre.sident, in the 

 chair. The following member.s -were re- 

 ported as present : 



Professor C. Abbe, Gen. Henry L. Abbot, 

 XJ. S. A., Professor Alexander Agassiz, Pro- 

 fessor George F. Barker, Professor Carl 

 Barns, Dr. John S. Billings, Professor H. P. 

 Bowditch, Mr. Lewis Boss, Professor W. K. 

 Brooks, General Thomas L. Casej', U. S. A., 

 Professor Charles F. Chandler, Professor S. 

 C. Chandler, General Cyrus B. Coinstoek, 

 Professor E. D. Cope, Professor Kussel H. 

 Chittenden, Professor Theodore N. Gill, 

 Professor Wolcott Gibbs, Mr. G. K. Gilbert, 

 Professor G. Brown Goode, Professor Ben- 

 jamin A. Gould, Professor Arnold Hague, 

 Professor Asaph Hall, Professor Charles S. 

 Hastings, Mr. George W. Hill, Professor 



0. C. Marsh, Professor T. C. Mendenhall, 

 Dr. S. Weir Mitchell, Professor A. A. Mi- 

 chelson, Mr. Edward S. Morse, Professor 

 Simon Newcomb, U. S. N., Professor Ira 

 Eemsen, Professor Henry A. Rowland, Pro- 

 fessor Charles A. Sohott, Professor John 

 Trowbridge, General Francis A. Walker, 

 Professor Charles A. White. 



The papers entered to be read were as 

 follows : 



1 . On Some Variations in the Genus Encope : 

 A. Agassiz and W. McM. Woodworth. 



2. Notes on the Florida Reef: A. Agassiz. 



3. The Progress of the Publications on the E.r- 

 pedition of 1891 of the U. S. Fish Commis- 

 sion Steamer ' Albatross,' Lieut. Commander 

 Z. Ij. Tanner, commanding : A. Agassiz. 



4. On Soil Bacteria : M. P. Ravenel. (In- 

 troduced by J. S. Billings.) 



