THE PULLEY. 199 



eyes. This was set up and made to expand 

 widely over the butt end of the tree. A 

 double cluster of pulleys, with a prodigious 

 hook^ hung from the top of this three-legged 

 machine. This was lowered^ so that the hook 

 might take hold of the huge chain^ with which 

 the timber below was many times encircled. 

 A long rope^ which connected the two boxes 

 of pulleys^ by passing in and out to each^ was 

 now fastened to one of the horses. When 

 they led the animal forward^ the under block 

 of pulleys rose^ and with it the huge butt end 

 of the tree^ high enough to permit that part 

 to be hitched upon the timber-carriage^ which 

 creaked and groaned beneath the w^eight. By 

 changing the situation of the chains, and 

 bringing the carriage gradually under, it was 

 at length made to sustain that prodigious 

 mass, which^ but for the application of the 



