184 FRAMEWORK 



glazing in windows and skylights makes the building much easier to 

 heat, the air space making an almost perfect non-conductor. 



Brozvn & Sharpe Foundry. In the Brown & Sharpe Mfg. Com- 

 pany's Foundry, a modification of the saw tooth roof was adopted in 

 which glass was used on both surfaces of the roof. The skylights ex- 

 tend east and west and have a pitch of 45 degrees. The southerly pitch 

 is glazed with opaque glass, the other with ordinary rough glass. The 

 ventilator monitor, which surmounts the skylights, is glazed with opaque 

 glass on the southerly side, and extends high enough so that no light 

 up to an angle of 70 degrees reaches the glass below. By this arrange- 

 ment no direct sunlight is admitted to the shop from above excepting 

 for a few minutes at noon during the longest days of the year. The 

 result of this overhead light, combined with the almost wholly glass 

 walls of the room is that the floor below is as light as out of doors, to 

 all intents and purposes, yet diffused light only is admitted. A rod 

 placed upright on the floor of one of these rooms casts no shadow. 



Conkey Printing Plant*. The printing plant of the W. B. Conkey 

 Co., Hammond, Ind., consists of a single story building, 540x450 ft. 

 The roof is of the weaving shed or saw tooth type and all windows 

 are glazed with frosted glass and are placed at an angle, looking toward 

 the north. Every 29 feet of roof space provides 1 1 feet of light. Ow- 

 ing to the angle of the roof the direct rays of light are kept out of the 

 building, which is thus lighted by the soft reflected rays from the 

 northern sky. The entire roof is built up out of light structural steel- 

 work resting on cast iron columns spaced 29 ft. c. to c. one way, and 16 

 ft. c. to c. in the other direction. The height of the trusses above the 

 floor is 12 ft. To prevent the snow collecting in the valleys between 

 the skylights, the bottom of the gutter and the glass are kept heated so 

 that the snow melts as it falls. This method produces condensation on 

 the inner surface of the glass, which is collected in a system of con- 

 densation gutters and carried outside the building. 



The heating and ventilating of the building is accomplished by a 

 blast system, with the heating ducts under the floor, which supply reg- 

 isters throughout the plant, arranged on the side walls of each depart- 

 ment. The heating system can be made to produce a mild heat for the 

 seasons of spring and fall, and can also be turned into a cooling sys- 

 tem in the summer, by running cold water through the steam pipes at 



*Engineering News, Dec. 8, 1898. 



