844 PROCEEDINGS OF THE ACADEMY OF [DeC, 



December 5. 

 Mr. Arthur Erwin Brown, Vice-President, in the Chair. 



Fifty-five persons present. 



The deaths of the following correspondents were reported : Fred- 

 erick W. Hutton, October 27, 1905; J. Burden-Sanderson, November 3, 

 1905; Gustave Dewalque, November 3, 1905. 



The Publication Committee reported that papers under the following 

 titles had been offered for publication since the last meeting : 



"Coon Mountain and Its Crater." By Daniel Moreau Barringer. 

 (December 5.) 



"Coon Butte, Arizona." By Benjamin Chew Tilghman. (Decem- 

 ber 5.) 



Coon Mountain and its Crater. — Dr. Dixon announced that Mr. 

 Daniel Moreau Barringer and Mr. Benjamin Chew Tilghman, members 

 of the Academy, had notified him of their discovery that the crater 

 of Coon Mountain or Coon Butte, in northern Arizona, twelve miles 

 southeast of Cailon Diablo Station on the Atchison, Topeka and Santa 

 Fe Railway, is an impact crater and not a crater produced by a steam 

 explosion, as has been supposed since the examination made of it by 

 members of the United States Geological Survey. They have proved, 

 by a large amount of development work, according to their statements, 

 that the large crater and elevation known as Coon Mountain is the 

 result of a collision with the earth of a veiy large meteorite, or possibly 

 a small asteroid, fragments of which are well known to the scientific 

 world by the name of the Canon Diablo siderites. Their development 

 work, consisting of cuts, shafts and boreholes, has established the fol- 

 lowing facts: 



First. That the formation of the crater and the deposition of 

 the meteoric material were simultaneous. 



Second. That meteoric material has been found five hundred feet 

 below the surface of the center of the crater; and, 



Third. That sandstone supposed to be in place exists less than one 

 thousand feet below the surface of the center of the crater. 



Mr. Barringer and Mr, Tilghman have presented to the Academy 

 for publication two comprehensive papers in which they set forth in 

 full their reasons for the above statements. 



Dr. Henry Skinner made a communication on his collecting trip of 

 last summer to the Huachuca Mountains, Arizona. (No abstract.) 



