52 NEW YORK STATE MUSEUM 



Cummings. Explanatory printed labels were supplied to the entire 

 series which at present occupies two flat cases in the Hall of New York 

 Minerals. 



Other installations. A temporary exhibit of the radio-activity of 

 carnotite was installed in the small case devoted to new accessions 

 and minerals of current interest. This exhibit was built up around 

 two handsome specimens of carnotite presented by Dr R. A. F. 

 Penrose, jr. A radio-photograph taken from a negative exposed 

 under one of these specimens, together with the objects used to 

 demonstrate the radio-activity and the light tight box used in the 

 demonstration, are all shown in the exhibit. 



An innovation which has so far met with marked success, consists 

 of the installation on a small table in the Mineral Hall of a group of 

 fifteen loose mineral specimens of appropriate size and excellent 

 quality, selected with a view to stimulating the casual interest in the 

 mineral collections. The public is encouraged to handle these 

 specimens to which are attached very simple labels, and Museum 

 publications which are to be found close at hand furnish the desired 

 information regarding them. It is interesting to note that no 

 specimen has been removed or lost. 



Extension work. With a view to emphasizing one of the appli- 

 cations of minerals to the arts, Mr Whitlock has been publishing 

 from time to time throughout the year a series of articles on forms 

 of gem cutting in the leading trade journal of the jewelry trade. 

 These articles, which are of a semipopular nature, discuss the various 

 forms in which precious stones have been cut with a view to estab- 

 lishing in the more important forms the maximum brilliancy- 

 efficiency. 



