254 Scicitific Proceedings, Royal Dublin Society. 
while the land driftage will still be carried down by the river to 
‘augment the bar. 
Also if either a straight or curved extension of the south pier 
was made under present circumstances it would be necessary that 
the north pier would also be elongated, as otherwise a shoal 
would accumulate to the north of the south pier; such an ex- 
tension of the north pier would cause a similar narrow entrance 
to that which exists at present, and is one of the great cra 
backs to the port, ever being a harbour of refuge. 
The northward driftage of the south beach ould easily be 
stopped by the erection of a system of groynes along the south 
beach, while the land driftage from the south might be prevented 
by a palisade similar to that proposed by Barton. 
It would, however, be also necessary to erect a palisade at the 
Chemical works to prevent driftage southward of the sand-bank 
that has in recent years accumulated north of the north pier. I 
would also suggest that in addition to the palisade on the south, 
that a strip of the sand-hills should be planted with firs. These, 
besides preventing the sand from travelling, would hereafter be a 
source of profit, while at the same time ne ought to purify the 
air, and be apreventative of the epidemics that so often break 
out in the low lying portions of Arklow. 
