ESTUARY HARBOURS, ETC. 



'57 



A preferable design would be that indicated by the dotted 

 lines, pier a, b, or the dead water embraced by it, being quite as 

 serviceable as pier X in training the channel, and at the same 

 time affording a much greater area for the expansion of waves 

 and for the shelter of vessels immediately on their entering the 

 harbour. 



FIG. 25. 



FIG. 26. 



R A D S T A D 



Ground plans of harbours, etc. 



Entrances formed by jetties projected from a shore, and 

 running either parallel to each other, or diverging in trumpet- 

 like form (Fig. 24), are undesirable in many ways. They 

 afford no facilities for the reduction of waves indeed, a trumpet- 



