REPORT OP NATIONAL MUSEUM, 1925 105 



types she portrays make lasting impression because of the sympathy 

 with which they have been studied. From Robert Ure, of Glasgow, 

 Scotland, the Museum received two prints charming in composition, 

 and from A. W. Hill of Edinburgh, Scotland, three which rank 

 high in all pictorial qualities. 



Loeb collection of cherrdcal types. — This collection, while main- 

 tained through the beneficence of the late Dr. Morris Loeb, is ad- 

 ministered as a separate entity in the Department of Arts and In- 

 dustries. The work is conducted under an advisory committee on 

 the Loeb collection, consisting mainly of Government officials inter- 

 ested in the subject of chemistry. The committee for the year was 

 composed as follows : Dr. James F. Norris, chairman of the Divi- 

 sion of Chemistry and Chemical Technology, National Research 

 Council, ex officio; Dr. C. A. Browne, Chief of the Bureau of 

 Chemistry, United States Department of Agriculture, ex officio,' 

 Dr. S. C. Lind, chief chemist of the Bureau of Mines, United States 

 Department of the Interior, ex officio; Dr. W. F. Hillebrand, de- 

 ceased. Chief of the Division of Chemistry, Bureau of Standards, 

 United States Department of Commerce, ex officio; James K. Senior, 

 representative of the committee in the Middle West ; Dr. C. L. Als- 

 berg, representative of the committee on the Pacific coast ; and F. L. 

 Lewton, representative from the United States National Museum. 

 The collection is in direct charge of Maj. O. E. Roberts, jr., curator. 



The purposes and scope of the collection were defined by the ad- 

 visory committee during the year, as follows : 



" It shall be the general purpose of this collection to collect and 

 preserve samples of substances, as defined below, the preservation of 

 which shall, in the opinion of the board, be in the interest of those 

 conducting chemical research. 



"It shall, further, be the general purpose of this collection to 

 provide, loan, or give to those requesting them to assist in the con- 

 duct of chemical research such small samples as may be spared of 

 chemicals comprising this collection gratis or at a nominal charge 

 to be fixed by this board. 



" Specifically, the collection shall include the following classes of 

 materials : 



"(1) All new chemicals prepared as a result of chemical research, 

 the preparation of which shall have been described in scientific lit- 

 erature. In all instances, where possible, such chemicals shall be 

 obtained from the original source. Samples of these substances may 

 be accepted, however, from other than the original source, pro- 

 Added they may be procured in a higher state of purity. [Note: 

 ' New ' in this paragraph signifies elements or compounds of defi- 

 nite composition prepared for the first time.] 



