Show wafer clock this Is probably too most curious tn the world A metal drum with a metal ala stuck through it Is upheld by two harings la anch manner that the latter gradually unwinds allowing the drum to descend under ordinary circumstances the drum would rna to the bottom lu a moment hut owing to an device it tikes exactly 24 hours to go from the top to the bottom each hour Is indicated by a peg and thua the jap can always tell what time it la the drum la divided inside by radial partitions into a series of compartments n one of which come water Is put the partitions are pierced by pin holes allowing the waitr to pats slowly through from compartment part ment to another as the drum goes down but it batery hard tor the drum to revolve as it by gravity to do because la it Is obliged to latt the water it can only go around as abt as the water ROCS from one compartment to another and thus ats speed can be regulated exactly kc cording to the size of the pin holes afore aid |