G. H. Kinahan — Tide Heights and Raised Beaches. 79 



above the height of mean water at each station. Column iv. gives 

 the mean height of high spring-tides at each station as referred to 

 the height of the lowest mean water, viz. that at Kilbaha ; and from 

 this column we learn that the lowest rise of spring-tides is at 

 Courtown, on the east coast of the co. Wexford. Column v. gives 

 the mean height of high spring-tides at each station above the mean 

 height of high spring-tides where this is lowest, that is, at Courtown. 









Table N"o. I. 











Stations. 



Col. i. 



Col. ii. 



Col. iii. 



Col. iv. 



Col. V. 



Remarks. 



1 



Kingstown 



8-395 



1-817 



5-958 



7-775 



4-504 





2 



Courtown 



7-598 



1-020 



2-251 



3-271 



0-000 





3 



Dunmore 



6-753 



0-175 



6-247 



6-422 



3-151 





4 



Castletownsend 



6-660 



0-082 



5-294 



5-376 



2 105 





5 



Kilbaha 



6-578 



000 



6-621 



6-621 



3-351 





6 



Old Head 



8725 



2-147 



6-455 



8-602 



5-331 



Inside ClewBay 



7 



Portrush 



8-682 



2-104 



3-552 



5-656 



2-385 





8 



Glenarm 



8-709 



2-131 



3-972 



6-103 



2-832 



( Ki the narrow 



9 



Ballycastle ... 



8-479 



1-901 



2-385 



4-286 



1-015< 



: in the North 



10 



Donaghadee ... 



8-745 



2-167 



6-301 



8-468 



5-197 



(channel 



11 



Ardglass 



8-638 



2-060 



7-793 



9-853 



6-582 





12 



Clogher Head 



8-184 



1-606 



7-474 



9-080 



5-809 











Table No. II. 









3 



Dunmore 



6-753 



0-175 



6-247 



6-422 



3-151) 



Estuary of the 

 Barrow 



13 



Passage West... 



6-934 



0-356 



6-667 



7-023 



3-752 



14 



New Ross 



7-667 



1-089 



7-155 



8-244 



4-973 j 









Table No. III. 









5 



Kilbalia 



6-578 



0-000 



6-621 



6-621 



3-351 ^ 





15 



Kilrush 



7-358 



0-780 



7-054 



7-834 



4-563 ( 



Estuary of the 



16 



Foynes 



8-092 



1-514 



7-535 



9-049 



5-778 1 



Shannon 



17 



Limerick 



8-567 



1-989 

 Table 



8-935 

 No. IV. 



10-924 



7-653; 





18 



Cashla Bay ... 



8-899 



2-321 



7-081 



9-402 



6-1311 



r^ T -■-» 



19 



Galway 



8-480 



1-902 



7-373 



9-275 



6-004 \ ^aiway isay 



20 



MuUaglimore... 



9 047 



2-469 



6-491 



8-960 



5-689 



Donegal Bay 



21 



Buncrana 



8-369 



1-791 



6-632 



8-423 



5-152 



Lough Swilly 



22 



Carrowkeel ... 



9-029 



2-451 



4-418 



6-869 



3-598 



Lough Eoyle 



In Table No. I. the stations given may be considered on the open 

 sea, except perhaps Old Head (No. 6) in Clew Bay, co. Mayo.-- If 

 we take a mean of column i. in this table, 8-012 is found to be the 

 mean height of mean water round Ireland above the Ordnance zero 

 plan.^ 



In column ii. of this table it is seen that the height of mean water 

 on the south-west coast between the mouth of the Shannon (Kilbaha, 

 station No. 5) and Waterford harbour (Dunmore, station No. 3) is 

 nearly uniform ; on the south-eastward part of the east coast it is 

 about a foot higher; and on the N.E., N., and N.W. coast from 

 Ardglass, co. Down (station No. 11), opposite the Isle of Man, to 

 Clew Bay, co. Mayo (station No. 6), nearly two feet higher. The 

 heights of mean water on the N.E., N., and N.W. coasts are not so 

 near to one another as the heights of mean water on the S.W. coast. 



^ It should be mentioned that the Ordnance Survey have adopted a slightly higher 

 level for the mean water ; they however in their calculation included the stations 

 Cashla Bay (No. 18, Table IN.) and Mullaghmore (No. 20, Table IV.). Both these 

 stations, however, are so situated that the heights of mean water thereat may be 

 affected by " counter-tides " generated by land in their respective vicinities. 



