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— Ring of the 



CRANE-ARM. DD— ThE SECOND RING. EE— LEVER-BAR. FF— ThIRD RING. 



GG— Hook. HH — Chain of thb dome. II — Chain of thb lever-bar 



