34 REPORT OF NATIONAL MUSEUM, 1891 



hepaticfe, iiuinberini;" over li,0()0 speciiueiis, from Dr. L. M. Under- 

 wood, and a eollectiou of 2,318 plants from Minnesota, transmitted by 

 Dr. (t. II. Sandberg". The total number of plants received during the 

 year from all sources was 40,963. This luimber, added to 39,()54, which 

 represents the total number of specimens received in the Museum up 

 to June 30, 1890, gives the total number of plants now in the National 

 Museum. The number of siDecimens mounted and added to the collec- 

 tions during the year is 8,945, and the number of sijecimens distributed 

 8,059. A list of the botanical papers i)ublished by the curator and by 

 other collaborators will be found in Section iv of this report. 



DIVISION OF OEOLOOY. 



?lIXEUAIvS. 



The growtli of this department, under the honorary curatorship of 

 Prof. F. W. Olarkc, chief chemist of the U. S. Geological Sur^'ey, has 

 been satisfactory, although no very large additions Avere made to the 

 collections. The routine work of cataloguini.-- and labeling specimens 

 occupied much of the time of the assistant curator, Mr. W. S. Yeates. 

 A nearly complete rearrangement of the systematic exhibition series Avas 

 carried out. Only three accessions of great importance have been re- 

 ceived, namely, 171 liussian minerals presented by Mrs. Mary I. Stroud ; 

 53 Freiberg minerals received in exchange from the Royal Saxon Mining- 

 School; and a superb series of specimens from the Broken Hill mines, 

 in Australia, given by Mr. Walter J. Koehler, and embracing speci- 

 mens of native copper, native silver, cerussite, cerargyrite, dyscrasite, 

 and chrysocolla. The gem collection of the late Prof. Joseph Leidy, 

 containing about 400 cut stones, was purchased for use in connection 

 with the proposed exhibit of the Museum at the World's Columbian 

 Exposition. The number of entries made during the year was 1,132, 

 including 7,315 specimens. 



gj:ology. 



Work in the department of geology has been largely confined to the 

 economic section, and a rearrangement and classification of the material. 

 The contributions of Mr. J. H. Huntington, Hyde Park, Mass. ; Mr. F. W. 

 Crosby, Washington, and Mr. J. P. lddings,U. S. Geological Survey, were 

 among the most important of those received duiing the year. A large lot 

 of onyx marble from the newly discovered deposit near Prescott, Ariz., 

 was received from Mr. AVilliam O'jS^eil. 



A specdal feature of the work of this de])artment consists in the 

 identification of specimens sent for examination and report, no less than 

 132 lots of specimens having been assigned to this department for this 

 purpose during the year. 



A change in the method of installation was effected during the year 

 by the introduction of bent- wire brackets, the sjiecimens being inclined 

 at an angle of GO or 80 degrees, 



