BOOK VTTI. 



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. 

 O— 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. 



