HARBOUR CONSTRUCTION. 



The form of entrance represented by Fig. 23 is objection- 

 able, inasmuch as waves are likely to be led up the channel by 



Direction of heaviest seas. 



drift. 

 Outgoing current from harbour. 



FIG. 22. 



FIG. 23. 



FIG. 24. 



Ground plans of harbours, etc. 



the pier TL, the area enclosed being insufficient for their proper 

 reduction. 



