CENTENARY OF THE SOCIETY. 



261 



by the entrance- hall and the necessary staircases, has been devoted 

 to this purpose. The buildings are so arranged that the Exhibition Hall 

 and Lecture Room, with cloak rooms and retiring rooms, may be let for 

 entertainments without interference with the privacy of the Society's 

 Council Room, Library, and Offices. 



Entering at the principal entrance, sets of oak doors lead into the 

 entrance hall, beyond which another set of oak doors gives access to the 

 Exhibition Hall, 141 feet long, 75 feet wide, and 48 feet high to the 

 underside of the roof lantern. On the south side of the Hall two An- 

 nexes, each about 46 feet long, 24 feet wide, and 17^ feet high, extend 

 to the front of the building. A musicians' gallery is provided at the end 

 of the Hall. 



Fig. 64.— Wisley as it now is — Bridge over the Upper Pond. 



The whole of the roof of the Hall is of. glass, supported by steel girders 

 spanning the entire width of the Hall, and surmounted throughout its 

 whole length by a lantern for ventilation. The walls are decorated in 

 ornamental plaster, and the panelled dado and balustrading are of oak. 



The warming of the Hall required very serious consideration, owing to 

 the large expanse of glass, and the system adopted provides for warming 

 the roof by means of low-pressure steam pipes carried across the roof 

 principals and having upwards of 1,000 square feet of radiating surface. 

 The body of the Hall is warmed by means of fresh air drawn from outside 

 through ducts, and after being thoroughly filtered and washed, and 

 warmed in heating chambers in the basement, it is propelled into the 

 hall by electrically driven fans. In summer time the same fans will 

 deliver cool washed air. 



