XV.-DEPARTMENT OF LITHOLOGY AND PHYSICAL GEOLOGY. 



By George P. Merrill, Acting Curator. 



The total nnmber of entries upon the department catalogue during 



the year has been 2,541, comprising not less than 3,000 specimens of 



various kinds. The more important of these accessions are given in 



the following list : 



Abbott, E. L. 10 specimens fulgurites from Union Grove, 111. 



Abert Collection. 24 specimens rocks from various sources. 



Aclermann, A. A., U. S. X. 117 specimens rocks from Greenland. 



Alexander, W. D. Sample of " barking sand " from Hawaiian Islands. 



American Institute of Mining Engineers. 1 large geological maj) of 

 Sweden and S4 specimens rocks. 



Army Medical Museum. 8 specimens rocks. 



Batchen, J. S. F. 103 specimens building stone from various States, 

 and 5 specimens rocks. 



Bartlett, Commander J. R. Specimens pumice and volcanic ash from 

 Krakatoa. 



Berendtj Dr. G. Samples of "barking sand" from seashore near Col- 

 berg, Germany. 



Beanchamp, W. M. 1 concretion. 



Bissel, John G. Supposed meteoric dust from near Rome, N. Y. 



Botc'ker, Torrey ct' Co., Boston. 6 specimens Egyptian onyx ; 1 speci- 

 men Griotte marble. 



Boston Foreign Exposition. 1-foot cube of building stone (limestone) 

 from the Hawaiian Islands, and 1 specimen building stone and 12 

 specimens rocks from Guatemala. 



Brady, Gilbert. 1 dressed cube building stone (sandstone) from Al- 

 bion, N. Y. 



Bran ford, J. C. 3 sun-baked bricks from the Great AVall of Chinn. 



Burlington Manufacturing Company. 1 specimen oj)hite marble. 



Calera Lime Works. 1 specimen building stone (limestone). 



Centennial Commissioners 1S70. 8 specimens building stone from the 

 Azores Islands, and 15 specimens rocks from the Argetitine Re- 

 public. 



Centennial Commissioners 187G [Carl Petterson). 14 specimens rocks 

 from Norway. 



227 



