SLIPWAYS. 331 



the third is represented as having been made clear of the cradle 

 and placed fair on cross-blocks of wood ready for examination 

 and repair. 



Only the lower portions of the slipways are permanent, 

 the length of this part being about 150 feet. That part of the 

 ways situated on the higher level can be removed after the 

 vessels are hauled up, and relaid when required for launching. 



The motive and hauling power is a 10 horse-power steam- 

 engine, geared by a line of shafting to four double-geared 9-to-l 

 winches, carrying J-inch best short-link chains, working through 

 upper and lower three-pulley blocks. 



The vessel is secured by IJ-inch iron slings, which are then 

 attached to the lower blocks, which are carried on wheels running 

 on ways laid down for the purpose. 



The speed at which the vessels are hauled out varies from 

 1 to 1 J foot per minute, the motion being continuous and ex- 

 ceedingly smooth throughout. 



