SECRETARY'S REPORT 35 



and restored oil paintings of American Indians by the artist George 

 Catlin, which was installed in the foyer of the Natural History 

 Building. 



By the year's end the major construction of the hall of fossil reptiles 

 was completed and several wall displays were partially or completely 

 installed by the staff of the division of vertebrate paleontology. This 

 hall will interpret the biological relationships among the reptiles 

 through time and the various ways in which they met environmental 

 demands. J. H. Matternes completed the large mural depicting an 

 early Miocene assemblage of terrestrial mammals. 



Many new and outstanding gems, including a 300-carat blue star 

 sapphire from Burma, were added to the gem exhibit. On November 

 9, 1961, the 245.35-carat Jubilee diamond, the third largest in existence, 

 was received on loan from its owner, Paul-Louis Weiller, and placed 

 on exhibition for approximately 8 months. 



Curatorial activity in the development of the hall of oceanic life, 

 including field collecting of specimens for exhibition, the specification 

 of models, and the writing of detailed exhibits scripts, was coordi- 

 nated by Dr. Fenner A. Chace, Jr., curator of marine invertebrates. 

 Detailed specifications for models of marine invertebrates were pre- 

 pared during the year for the guidance of highly skilled modelmakers. 



Construction of the new hall of cold-blooded vertebrates began early 

 in May 1962. Displayed in this hall when completed will be repre- 

 sentative types of fishes, amphibians, and reptiles, and exhibits inter- 

 preting their life activities, anatomical adaptations, breeding 

 behavior, distribution, and developmental history. 



Plannmg of the exhibits for the new hall of osteology was advanced 

 during the year. Skeletons of mammals, birds, fishes, reptiles, and 

 amphibians have been carefully selected to illustrate relationships, 

 variations, specializations, and adaptations. General topics, such as 

 the nature of bones and the interrelationships of skeletal parts, also 

 will be presented in this hall. 



The temporary exhibit of mollusks in the west hall of the second 

 floor was removed to provide space for construction activities in the 

 adjacent exhibit hall. 



Curatorial efforts in the department of science and technology were 

 directed toward the acquisition of specimens, the specification of 

 models to be built, and the writing of exhibits scripts. Exhibits for 

 five halls to be installed in the new Museum of History and Tech- 

 nology Building were in production during the year. Twelve new 

 exhibits on health education and the history of medicine, pharmacy, 

 and dentistry were installed in the gallery of medical sciences in the 

 Arts and Industries Building. They illustrate child health, the use of 

 X-rays in medicine, hearing aids and surgery of the ear, inhalers, 



