198 



Reports on Special Researches 



these brackets are laid soapstone slabs, 1^ and 2 inches thick. A number of 2-inch soapstone 

 slabs are mounted on stands made of 1 j-inch pipe; these have the advantage that they may 

 be moved about. The equipment also includes substantial wooden tables, manufactured 

 b}^ the Kewaunee Manufacturing Company, with 4-inch square legs and If -inch tops of 

 birch made of strips specially tongued and glued together ; these tables are in 2 sizes, 33 by 

 60 inches and 42 by 72 inches. Some of the bracket slab-tops are 36 inches and some, 

 particularly those for galvanometers, are 4 feet 6 inches above the floor; the wooden tables 

 are 33 inches in height, and the soapstone tables on pipe stands, 36 inches. 



The chemical laboratory is fitted with a bracket stone slab extending in front of the 

 windows. A special ventilation duct to the roof with exhaust fan is provided for a hood 

 of the usual sliding-door type; to the hood has been added a special compartment for charging 

 portable storage batteries. The chemical table is furnished with sink, racks for reagents, 

 drawers, cupboards, and special storage place for glass rods and tubes. The dark room 



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II II It II n II II II !i 



T I L C 



TILE D r/C K. 



iCALE. IN MtTE^S 



Fig. S. Plan of Attii^ and Roof of Main Building. 



ailjoins the chemical laboratory and is entered by two doors and a vestibule. A soapstone 

 sink with long soapstone drain-board is provided, together with special direct-current, 

 alternating-current, and gas outlets. 



The second floor (Fig. 7) is devoted entirely to the Director's headquarters, w'orking 

 rooms for the staff, and library and archives. Provision has also been made for chatting and 

 blueprint rooms, and for a kitchenette in room No. 303 for the use of the staff and occasional 

 use when meetings are held in the building. The two library rooms are connected by a 

 large double sliding-door, so that they may be used practically as one room 37 feet long and 

 24 feet wide. A special conduit and connections are installed for a stereopticon. The 

 records are filed in special vertical file cases to facilitate rapid reference. 



The central portion of the attic space (Fig. 8), with a clear ceiling height of 7 feet 2 

 inches, is 79 feet long and 29 feet wide; this space is lighted by means of 2 skylights and 

 2 windows in the hatchway leading to the observation deck above, and being plastered fur- 

 nishes an excellent place for storage and for certain experimental work. There is no elevator, 



