XCIV PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



present year. The various overlaps of the different accumulations, 

 the modifications of the conditions under which they have heen 

 formed, the intermingling of igneous products, the great thickness of 

 the deposits, and the distribution of the remains of life entombed in 

 them, render this region one of great interest, and well-worthy the 

 searching investigation that it has undergone. The maps of Cardi- 

 ganshire and Montgomeryshire, including the mineral veins of those 

 counties, have been published during the year, and maps of other 

 portions of North Wales are now in the hands of the engraver. 

 Dorsetshire is nearly completed, and much information will be found 

 in the map of that district, not only as respects the range and mode 

 of occurrence of the oolitic and cretaceous series, but also as regards 

 the fractures or faults by which it is traversed, and which have been 

 surveyed in great detail. The examination of the tertiary deposits of 

 Dorsetshire and Hampshire has also far advanced. Derbyshire is 

 approaching to completion, and much progress made in the coal di- 

 strict of Staffordshire. 



The map of the county Wicklow has been published, and with it 

 sections, on the usual scale of six inches to the mile for both height 

 and distance, which exhibit the mode of occurrence of the various 

 rocks of that district. The sections more particularly exhibit the 

 manner in which masses of pre-existing deposits (Silurian and Cam- 

 brian) have been hoisted up upon the granite of the great range of 

 that rock extending through the county Wicklow by the counties 

 of Carlow and Wexford to the southward. The general curve of the 

 uprise is well seen in these sections, with portions of the uplifted and 

 altered sedimentary rocks still sticking upon the granite, sho\^dng that 

 the movement was effected posterior to the deposit of the Silurian 

 rocks of the counties Wicklow and Wexford, and anterior to the de- 

 posit of the mountain limestone. Indeed, more to the soutliAvard it is 

 found that the uprise of the granite was anterior to the deposit of the 

 old red sandstone, since the latter contains pebbles and smaller de- 

 tritus of the granite upon which it is seen quietly to repose. The manner 

 in which the mountain limestone overlaps the old red sandstone, and 

 reposes directly upon the granite, near Carlow, is shown in one of the 

 sections above mentioned. The sections also exhibit the distances to 

 which the sedimentary deposits have been altered or metamorphosed 

 in consequence of the intrusion of the granite amid them. A large 

 plan of the mining district of the Ovoca has also been published, and 

 the maps of the counties of Carlow and Kildare will shortly appear. 

 Portions of the Queen's county and county Kilkenny are completed, 

 and the counties of Dublin and Wexford are in progress. 



Museum of Practical Geology, London. 



The donations to this establishment have been, as heretofore, both 

 abundant and valuable. Great additions have been made to the col- 

 lections illustrative of the applications of geology to the useful pur- 

 poses of life, and of the mineral wealth of our country ; and it should 

 be borne in mind with respect to such establishments, that the appli- 

 cations of science by advancing civilization at the same time increase 



