18 GEOLOGY. 



Lower Miocene and the Glacial periods. It is not a true rock-basin, 

 and could not have been formed by ice-action, but is part of an area of 

 depression, and is due to the existence of faults, assisted by subaerial 

 denudation. The deposit of clay, sand, &c. found on the southern 

 shore and for some miles inland is the delta of a former large river, 

 which flowed very much in the same course that either the Upper Bann 

 or the Blackwater does now. These clays are of much later date than 

 the basalt ; the silicified wood of the lough may be referred to the 

 lignite -beds of the latter. By the help of these clays we learn that 

 the main features of the country are newer than the basalt, but older 

 than the Glacial epoch, and that the great denudation which has affected 

 the IS", of Ireland belongs to the same time. E. T. H. 



Haviland, A. The Geographical Distribution of Heart Disease and 



Dropsy, Cancer in Females, and Phthisis in Females, in England 



and Wales. Fol. Lond. Pp. viii, 116 ; 9 coloured maps. 



Contains notes on the soils, geology, and physical features of 



various districts, and notices the relation of these to the distribution of 



disease. W. T. 



Hawkesley, T. Eeport upon the Boring for Water. Rep. Rughy 



School Nat. Hist. Soc. for 1874, pp. 71, 72. (Reprinted from 



Rughy Advertiser of 1862.) 



The water rises from the waterstones of the New Red Sandstone, but 



is brackish. [A coloured section of the well was published in the Report 



for 1868.] Analysis of the water by Dr. Odling given. W. H. D. 



Hawkshaw, J. C. The Construction of the Albert Dock at Kingston- 

 upon-Hull. Proc. Inst. Civ. Eng. vol. xli. pp. 92-124, plates. 



The nature of the strata is described on pp. 93, 94, and is illustrated 

 by the Sections on Plate 8. The foreshore was covered with silt or 

 Varp, 30 feet thick in some places, but thinning out towards low-water 

 line ; below this was peat, 2 to 8 feet ; then two beds of Boulder Clay 

 separated by sand, the upper with, the lower without stones. The 

 lower clay was separated from the Chalk by 16 feet of sand. This held 

 water under considerable pressure, which frequently forced its way 

 up through the higher beds in " boils " or " blow- wells ; " these are 

 described on pp. 98-109 and in the discussion. W. T. 



Hesse, E. A. von. Der unterseeische Tunnel zwischen England und 

 Frankreich vom geologischen, technischen und fiuanziellen Staud- 

 punkte beleuchtet. [The Channel Tunnel.] 8vo. Leijjzic. Pp.32,' 

 geol. map, sections, and plate. 



Geological notes pp. 6-14. Map and sections reproduced from Topley, 

 Quart. Journ. Sci. 1872. 



Hicks, H. On the Succession of the Ancient Rocks in the vicinity 

 of St. David's, Pembrokeshire, with special reference to those of 

 the Arenig and Llandeilo Groups, and their Fossil Contents. Quart. 

 Journ. Geol. Soc. voL xxxi. pp. 167-195, pis. viii.-xi. (map and 

 Eections, fossils, and table of strata). 



