68 Report of the President 



cessfully as demonstration models before small audiences, and 

 have led to the inception of an extended series, now in course 

 of construction, the object of which will be to present the new 

 idea of crystallography as a special exhibit in two flat wall 

 cases between the window space on the north wall of the 

 Mineral Hall. 



During the year the Department was called upon by the 

 Bray Studios to furnish suggestions and illustrative material 

 for motion picture films of a popular educational 

 Extension character, covering mineralogical subjects. This 



cooperation has resulted in the production of the 

 following educational films : Gem Cutting and Polishing, Mys- 

 teries of the Snow, Dew, In Nature's Treasure House, Win- 

 dow Frost. 



The preparation of a classified list of the new crystal forms 

 of minerals which have been announced since the publication 

 , of the Index der Krystallformen der Mineralien, 



and by V. Goldschmidt, has been undertaken. This 



Publications W ork, which covers the mineralogical literature 

 of the past 25 years and involves some 5,000 entries, is now 

 well advanced. Its publication in the Museum Bidletin will 

 place in the hands of the research worker in Crystallography 

 a means of judging as to whether an observed crystal form is 

 new to the species under investigation, without the necessity 

 of a laborious search through the voluminous and widely scat- 

 tered literature of the subject. 



Two short papers have been published during the year, one 

 in the Report of the Director of the New York State Museum 

 for 1917, and the other in The American Mineralogist. 



Among the notable additions to the Collections during the 



past year, are included 5 species not heretofore represented. 



Three small but characteristic specimens of the 



newly discovered zeolite ferrierite from Kam- 



loops Lake, British Columbia, were presented by Dr. W. D. 



Ferrier, after whom the mineral was named. A specimen 



