BOOK X. 



479 



-.///JJJ. IJJJJJJ .JJL , 



A CRANE-POST. B SOCKET. C OAK CROSS-SILLS. D BAND. E ROOF-BEAM. 

 F FRAME. G LOWER SMALL CROSS-BEAM. H UPRIGHT TIMBER. I BARS WHICH 



COME FROM THE SIDES OF THE CRANE-POST. K BARS WHICH COME FROM THE SIDES OF 

 THE UPRIGHT TIMBER. L RUNDLE DRUMS. M TOOTHED WHEELS. N CHAIN. 



O PULLEY. P BEAMS OF THE CRANE-ARM. Q OBLIQUE BEAMS SUPPORTING THE BEAMS 



OF THE CRANE-ARM. R RECTANGULAR IRON PLATES. S TROLLEY. T DOME OF THE 



FURNACE. V RING. X THREE CHAINS. Y CRANK. Z THE CRANE-POST OF THE 



OTHER CONTRIVANCE. AA CRANE-ARM. BB OBLIQUE BEAM. CC RlNG OF THE 

 CRANE-ARM. DD THE SECOND RING. EE LEVER-BAR. FF THIRD RING. 



GG HOOK. HH CHAIN OF THE DOME. II CHAIN OF THE LEVER-BAR 



