Reviews — Nottingham Geology. 87 



building materials, such, as flint and artificial stone. Then follow 

 important chapters on the decay, preservation, and testing of building- 

 stones, appendices on quarries, a list of some useful books, and an 

 excellent index. 



While the bulk of the work is rightly taken up with descriptions of 

 British building-stones, their lithological characters, chemical and 

 physical properties and distribution, there are also descriptions of the 

 leading rocks used for building purposes in various parts of the world. 

 The general distribution of the rocks in Britain is shown on the series 

 of maps, and the structure of many of them is well depicted on plates 

 from photomicrographs. The illustration of the weathering of Port- 

 land Stone is also excellent. Attention is given to the adaption of 

 particular rocks to different purposes and in diverse situations, and 

 mention is made of buildings constructed of. the more important 

 freestones and other materials. A little more might have been said 

 with advantage about quarry-water and the seasoning of stone, and of 

 the use of the term freestone. 



A few statements and some names of places require emendation ; 

 thus the Clipsham Stone (p. 218) comes from Rutlandshire (not 

 Oxfordshire), as may be inferred from previous references to it, while 

 the Taynton Stone (p. 238) was quarried near Burford in Oxfordshire, 

 though not far from the borders of Gloucestershire. The reference on 

 p. 429 should be to Taunton. 



The author has ■evidently devoted great pains to render his work 

 as complete as possible, although the limitations of space have 

 unfortunately prevented references to particular sources of information; 

 but he has demonstrated by his careful record of facts and by his lucid 

 explanations how much of scientific and practical interest, as well as 

 importance, may be learnt from the geological study of building- 

 stones. 



III. — The Geology of the Country around Nottingham. By G. W. 



Lamplugh, F.R.S., and W. Gibson, D.Sc. London: printed for 



H.1L Stationery Office, and sold by E. Stanford, Long Acre, and 



T. Fisher Unwin, Adelphi Terrace. 8vo ; pp. vi, 72, with 



6 photographic plates, 1 sheet of sections, and 9 text-illustrations. 



1910. Price 2s. Special colour-printed map, price Is. 6d. 



Ti^OR the benefit of students in important educational centres the 



X; Geological Survey has issued special maps when the town or city 



happened to come near the margin of the ordinary (New Series) 



1 inch sbeets. London (as noted in our December Number) required 



four sheets. Oxford, and now Nottingham, have been given special 



sheets, while places like Cardiff, Swansea, and Southampton come 



■within the central portions of the ordinary sheets. Among the New 



Series sheets Plymouth might advantageously be represented on 



a special sheet. 



The memoir before us is made up of Sheets 125, 126, 141, and 142, 

 already described in four memoirs, but the object now is to give a more 

 general account of the geology, with less detail. It is rather curious 

 to note that the usual chapter on economic geology is omitted, because 

 " the map and present memoir are intended primarily to serve the 



