114 Proceedings of the Uoyal Irish Academy. 



points out, especially as regards the large percentage of arsenic in these coarse 

 coppers. So that the difficulty of casting copper, except in open moulds, 

 does not seem to be a sufficient explanation of the copper series of types in 

 Ireland, which implies a development of the metal form in the copper series. 

 The scarcity of copper implements in Britain, which is explained by the 

 presence of tin in quantity (bronze and closed moulds), is perhaps open, 

 therefore, to another explanation. 



