NEW BUILDINGS OF DEPARTMENT OF AGRICULTURE. 949 



The administration Iniilding- will be designed solely for office and 

 library purposes, and will be five stories high. The laboratories will 

 be in the wings, which for the present at least will also contain some 

 offices. Only the two wings are to be erected at this time, and these 

 will appear as independent structures, separated l)y an opening of 1^20 

 feet. When these are connected l)y the administration building an 

 imposing front of approximately 750 feet will be presented, the cen- 

 tral building projecting 85 feet beyond the front line of the wings. 



The wings will have a frontage of 256 feet each, and the ells will 

 extend 100 feet from the front line to the rear. They will be four stories 

 in height, above a high l)asement and a subbasement, and about 60 feet 

 in width (from front to rear). Both wings will be exactly alike in size, 

 construction, and arrangement of the rooms. The basement in each 

 case will be about 12 feet high and mainly above ground, so that it 

 may be used for laboratories and certain mechanical operations. The 

 first and second stories will be 16 feet 8 inches, the third storv 15 feet 

 Ti inches, and the fourth story 13 feet 9 inches in height, with a low 

 air space above. 



Corridors about 12 feet wide, running the entire length, will divide 

 each wing in half, giving a series of comuumicating rooms on either 

 side. These rooms will be units of about 20 by 22 feet in the clear, 

 the M'indows and doors being so arranged that the rooms ma}^ be divided 

 if desired by temporary partitions, making an office and a la])ora 

 tor}', or two office rooms, about 11 by 20 feet. The partitions dividing 

 the rooms at right angles to the corridors will consist of two four-inch 

 brick walls, 14 inches apart and tied together, thus providing a series 

 of continuous open spaces extening from the subbasement to the attic. 

 These hollow partitions will carr}' the hot-air flues and the flues for 

 ventilation. Each room will have two hot-air flues, two ventilating 

 outlets, and two flues for the ventilation of hoods. The room ventila- 

 tion will be downward, the flues for each wing connecting in the sub- 

 basement with two vent passages leading to two vent shafts, each pro- 

 vided with a fan for discharging the air. The hoods will be ventilated 

 b}' an up-draft, the flues terminating in the attic, which is left as one 

 large room, and the fumes being drawn out of that b}^ fans. The 

 hot-air flues will be of galvanized iron and all the vent flues of terra 

 cotta. 



The subbasement will be given up entirel}' to the heating and venti- 

 lating system, and to conduits carrving the supply pipes. Heat will 

 be supplied ])y indirect radiation, the steam ])eing furnished ])y a power 

 plant located in a special building already provided for. There will be 

 no direct radiators except at the ends of the corridors and in the toilet 

 rooms. The incoming air will pass thi-ough filters to remove the dust, 

 and then through the piimary heaters which will raise it to a tempera- 



30972— No. 10—04 2 



