BOOK VIII. 



291 



A— Workman carrying broken rock in a barrow. B— First chute. C— First box. 

 D— Its handles. E— Its bales. F— Rope. G— Beam. H— Post. I— Second 

 CHUTE. K— Second box. L— Third chute. M— Third box. N— First table. 

 0_First sieve. P— First tub. Q— Second table. R— Second sieve. S— Second 

 TUB. T— Third table. V— Third sieve. X— Third tub. Y— Plugs. 



