That damages by eruptions are soon repaired is shown in two photographs of the 

 volcano Izalco in El Salvador, Central America, taken on a Museum expedition. 



George Langford, Curator of Fossil Plants, made routine 

 identifications of miscellaneous collections from the Pennsylvanian 

 Cretaceous and Eocene and added a number of new species to the 

 illustrated nontechnical manuscript that he has been preparing. 

 He discovered these new species in the Pennsylvanian collections 

 he has himself made and in those donated by Dr. and Mrs. R. H. 

 Whitfield, Associates in the Division of Fossil Plants. Curator 

 Langford, accompanied by Chief Preparator Gilpin, spent two weeks 

 in the field and made a fine collection of fossil flora from the Meso- 

 zoic and Cenozoic of Tennessee, Mississippi, and Alabama. 



A long-felt need in routine and research work in mineralogy, 

 crystallography, and meteoritics has been met during the year by 

 installation of a General Electric XRD-5/F diffraction unit with 

 facilities for film, direct-measurement diffractometer, and direct- 

 measurement spectographic techniques. The laboratory housing 

 the equipment has been named the William J. and Joan A. Chalmers 

 Mineralogical Laboratory in memory of s Mr. and Mrs. Chalmers 

 and in recognition of their interest in minerals and their generous 

 support of the promotion and growth of the mineral collections, 

 especially the crystal collections, of the Museum. Albert William 



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