together with necessary rewiring for floodlighting the whale skeleton 

 in Hall 19 (Zoology) and the huge model of the moon in Hall 35 (see 

 page 66). Additional electrical outlets were placed in Stanley Field 

 Hall to give greater flexibility in handling our special exhibits (see 

 page 26). The Rare Book Room of the Library was rearranged and 

 rewired for new lighting fixtures (see page 82). Exhaust fans were 

 installed in the public picnic-room on the ground floor and in the 

 X-ray laboratory in the Department of Geology, and photography 

 workrooms were rewired to provide for additional equipment. 



Care of the collections, a prime objective, is aided by the continual 

 poisoning of cases that house materials subject to insect damage, the 

 care of special equipment controlling heat and atmospheric moisture 

 that would be deleterious to film and certain other materials, and 

 the constant fire inspections and care of fire-fighting equipment. 



During the summer shut-down, boilers were cleaned, brickwork 

 repaired, and boiler drums wirebrushed. The heater tank, chemical 

 lines, pumps, and motors were cleaned and overhauled as necessary. 

 The old coal-bunkers were replaced by new ones of copper-bearing 

 steel, and new chains and flights were provided for the coal conveyor. 

 Inability of the Chicago Tunnel Company to handle the removal 

 and disposal of ashes required construction of a new lift from the 

 boiler room to a height sufficiently above street level for easy 

 dumping of waste material into trucks. General maintenance of all 

 electric and pumping lines and equipment was carried on throughout 

 the year. Under existing contracts, a total of 27,930,500 pounds 

 of steam was provided for Shedd Aquarium and the Chicago Park 

 District and an additional 36,455,500 pounds of steam were used 

 by the Museum. 



MISCELLANEOUS 



In the pages that follow are submitted the Museum's financial 

 statements, attendance statistics, door receipts, accessions, list of 

 Members, articles of incorporation, and amended by-laws. 



Clifford C. Gregg, Director 

 Chicago Natural History Museum 



110 



