Another major project in the Division of Engineering was the 

 installation of a third boiler to replace a boiler that had been in- 

 stalled in the building before 1920. The old boiler had been used 

 in recent years only for short periods, and careful appraisal in- 

 dicated that it could no longer be operated at the high pressures 

 used in the two newer boilers installed ten years ago. Therefore it 

 was removed, and new equipment was installed that could be used 

 either independently or with the other boilers. Work was begun 

 on the removal of the old boiler in June, and the new boiler was 

 ready for service early in December. 



In the summer months routine cleaning, inspection, and replace- 

 ment of parts were completed for boilers, pumps, and other ma- 

 chinery. Two of the two-inch steam lines feeding steam to Hall 4 

 (Anthropology) and Hall 16 (Zoology) were found to be in bad 

 condition and were replaced with new pipe and re-covered. Other 

 steam-line and plumbing maintenance was taken care of as required. 



During the year new slim-line fixtures were installed in Hall 4 

 (Anthropology) to improve lighting. Lighting of exhibit cases was 

 completed in Hall 8 (Anthropology) and in Hall 26 (Botany). Gas 

 lights formerly used to mark the exits in James Simpson Theatre 

 were replaced with new approved electrical units. Switches on the 

 main switchboard were replaced to elmininate any possible loss of 

 current by improper contact. 



Under existing contracts with the John G. Shedd Aquarium and 

 the Chicago Park District, a total of 11,673,350 pounds of steam 

 was furnished to the Aquarium and a total of 17,132,794 pounds of 

 steam was furnished to the Park District. A total of 64,776,350 

 pounds of steam was generated, 35,970,206 pounds of this amount 

 being used to heat the Museum building. 



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 



108 



