XV.-DEPARTMENT OF L1THOLOGY AND PHYSICAL GEOLOGY. 



By George P. Merrill, Acting Curator. 



The total number 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. 



Alert Collection. 24 specimens rocks from various sources. 



Ackermann, A. A., U. S. N. 117 specimens rocks from Greenland. 



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



A mtrican Institute of Mining Engineers. 1 large geological map of 

 Sweden and 84 specimens rocks. 



Army Medical Museum. 8 specimens rocks. 



Batchcn, 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. 



Berendt, Dr. C. Samples of "barking sand" from sea-shore near Col- 

 berg, Germany. 



Beauchamp, W. M. 1 concretion. 



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



Bowker, Torrey & Co., Boston. 6 specimens Egyptian onyxj 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. V. 



Branford, J. C. 3 sun-baked bricks from the Great Wall of China. 



Burlington Manufacturing Company. 1 specimen ophite marble. 



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



Centennial Commissioners 1870. 8 specimens building stone from the 

 Azores Islands, and 15 specimens rocks from the Argentine Be- 

 public. 



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

 from Norway. 



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