THE MECHANICAL PLANT INTRODUCTORY 



OFFICE OF TIIK C11IKF K.\(;i.\EEK OF TIIK SINCiKK BULDING 



BEFORE the present ultenitions and additions 

 were made, the plant of the old Singer and 

 Bourne Buildings consisted principally of 



four Babcock & Wilcox water-tube boilers ag- 

 gregating 546 H. P., and seven Diehl generators, 

 of a total capacity of 387.5 kilowatts, direct-con- 

 nected to six Ball & Wood engines of 572 indi- 

 cated H. I'. There were further three 10-in. 

 x 6-in. x 10-in. house-service and fire pumps, 

 the usual complement of boiler-feed and return 

 pumps; three feed-water heaters; pumps, tanks 

 and motors for three hydraulic and three elec- 

 trical elevators; a 2^-ton refrigerating plant; a 

 10 H. P. vacuum sweeping plant; vacuum return 

 pumps and tanks, air compressors, filters, grease 

 extractors, separators and other similar appur- 

 tenant-' 



Roughly speaking, this plant occupied the westerly 



[80 



half of the basement of the old Singer Building and 

 the easterly half of the basement of the adjoining 

 Bourne Building, the boilers being located in the 

 forward part of these spaces. 



After careful consideration it was found that the 

 owners' interests would be best served by replacing 

 this entire equipment with a new plant of ample 

 capacity to take care of the remodeled and greatly 

 enlarged group of buildings. But it was necessary to 

 accomplish this transformation gradually, according 

 to a carefully prearranged programme, for while 

 the change was being made the Singer and Bourne 

 Buildings had to be supplied uninterruptedly with 

 heat, light, water and elevator service, and the new 

 buildings with temporary heal and light. 



The new boiler plant, consist ing of five Bab- 

 cock & Wilcox water-tube boilers, aggregating 

 about 2,000 II. P., was therefore installed first, and 



