16 



In addition to the 6 stationary 

 Engines already mentioned, this 

 main has connected with it 31 Fire 

 Cocks and 9 Stop Cocks, the whole 

 being numbered consecutiYely from 

 40 to 81, both inclusive. All these 

 Stop Cocks, except the Cock marked 

 35 on S.W. Staircase, are ordinarily 

 kept open ; but any one or more of 

 them can be shut in case of need, so 

 that, if required, the whole of the 

 Engines can be worked together 

 through one or more Fire Cocks. 



The Hose pipes, the branches or 

 directing pipes, and other necessarj^ 

 appliances for this main, are kept on 

 the roof in boxes, which stand close 

 by the Engines. 



THE ENGINES AND FIEE COCKS 

 AEE NXJMBEEED IN THE 

 FOLLOWING OEDEE. 



BASEMENT OF READING ROOM. 



Ko. 



1. West Angle of South Wing. 

 2 South End of West Wing. 



Between Nos. 2 and 3 there is a 

 Hand Pump in the Gallery. 



