374 Scientific Proceedings, Royal Dublin Society. 



The list of the limestone quarries will not be so full, as it 

 would be unnecessary and undesirable to mention all quarries £ 

 the nature of the proposed list being to point out as many places 

 as possible where good stones, suited for cut- stone purposes, can be 

 obtained, or stones that, from some specialty, are eminently suited 

 to be used in the construction of piers, harbours, or such-like 

 massive works. These lists will be complete, as far as possible : 

 but some isolated quarries, locally, though not generally, known, 

 may be omitted. At the end of each county list is given the 

 general nature of the lime, and other purposes are mentioned to 

 which the stone has been applied. In the counties where lime- 

 stone is scarce, all localities in which it is found are given, whether 

 they are suitable for cut-stone purposes or not. 



The geological grouping adopted is the same as that given in 

 the Table of Geological Strata in the Paper "On Irish Metal 

 Mining" (ante p. 204). 



Some of the recent limestones accumulating at the present 

 time might be utilised in the manufacture of articles of vertu. 

 They scarcely, however, come within the scope of this Paper, 

 although it would be incomplete without a reference to them. 

 Such are the stalactytes and stalagmytes of the caves, and the 

 massive tufas accumulating in the vicinity of some of the cal- 

 careous springs. 



Next before these in geological order is the Cretaceous or White 

 Limestone, of a similar age to the English Chalk, but possessing, 

 on account of its induration, a distinct character of its own. This 

 stone is principally quarried to burn into lime, as it is not suited 

 for fine tool-work, being full of concealed cracks and irregular 

 joints. It can, however, be scabbled into stones of small dimen- 

 sion, very suitable for rough masonry. In some places it is ground 

 up, and manufactured into whiting. 



The limestones belonging to the Lias are of little note, being 

 only nodules and layers of small dimensions, and apparently of 

 little value, as all attempts to convert them profitably into a cement 

 have, up to the present, failed. 



In the Trias there are, in a few localities, massed and lenticular 

 beds of gypsum. 



In the Permian beds, the only known calcareous rocks are- 

 dolomytes. They are so rare, that they have been little utilized,, 



