Reviews—Geology of the Lands End District. 517 
It is pleasant to read that a cordial acknowledgment of the services 
rendered by the Rev. W. H. Coleman (given in the earlier volume) is 
also made in the present work, in which, indeed, there is a full 
bibliography drawn up with characteristic precision by Mr. Fox- 
Strangways. Everywhere throughout this volume we find a careful 
and methodical statement of the facts, with due acknowledgment of 
previous workers. 
The author gives an interesting history of the development of the 
coalfield, from the earliest mention of coal-working in the district— 
the reign of King John in 1204—to the present-day workings. 
Mention is also made of the clay that has been extensively used in the 
manufacture of sanitary earthenware. Not the least important part 
from a practical point of view is the record of colliery borings and pit 
sections, which occupies nearly 200 pages. A useful chapter is also 
devoted to a consideration of the probable extension’ of the coalfield 
beyond the present workings. While, however, the memoir is mainly 
occupied with a detailed description of the Coal-measures, there are 
appropriate accounts of the older and newer formations, of the Pre- 
Cambrian, Triassic, Pleistocene, and Recent deposits. 
Paleontological information is by no means neglected. There is 
a list of fossils from the Carboniferous Limestone based largely on 
a collection made by Mr. H. Vassall; while an important section on 
the paleontology of the Coal-measures has been contributed by 
Mr. A. R. Horwood, a zealous worker at Leicester. 
In this full and practical account of the geology of an important 
coalfield are embodied the results of the final official field-work of the 
author, who has since retired from the public service. 
IIJ.—Tue Grotoey or tHe Lanps Enp District. By Crement Rem, 
F.R.S., and J. 8. Frert, M.A., D.Sc.; with contributions by 
B. 8. N. Witxinson, E. E. L. Drxon, B.Se., and W. Pottarp, 
M.A., D.Sc. Mining appendix by D. A. MacAnistrr, A.R.S.M. 
pp. 158, with 6 plates and 35 text-illustrations. Price 3s. 6d. 
TTENTION was drawn in the April number of the GroroeicaL 
MaeazinE to the memoir on ‘‘The Geology of Falmouth and 
Truro and of the Mining District of Camborne and Redruth.”? We 
are now able to introduce to notice the description of the adjacent 
area on the west, which includes the mining regions of St. Just, 
St. Ives, and Gwinear. The slaty rocks of this area are grouped as 
Lower Paleozoic, in accordance with Mr. J. B. Hill’s grouping of the 
Mylor, Falmouth, and Portscatho Series, which may be Ordovician or 
of earlier date. More interest attaches to the physical structure of the 
district, to the greenstone and granite intrusions, to the effects of 
metamorphism, and to the genesis of the mineral veins. The sills of 
greenstone produce great alteration, which, however, extends but 
a short distance, in the adjoining killas; and rocks thus changed 
appear to have been little influenced by the subsequent granite 
intrusion. The granite is described as occurring in great sheets or 
laceolites, and to form an undulating floor over the whole of the 
region described, and at no great depth (as mentioned on p. 3), or at 
