i8 NOTES ON DOCKS AND DOCK CONSTRUCTION. 



at high water of ordinary spring tides of 35 feet 8J inches, and 

 25 feet 8J inches at neap tides. 



At the north and south corners of this basin there are two 



FIG. 10. 



dry docks, that at the north being 600 feet long, with 60 feet 

 width of entrance. The depth of water over the sill at high- 

 water spring tides being 23 feet, and at neap tides 13 feet. 



