172 Reviews and Book Notices. 



vStakeley Beck, Hollin Gill and Birk Beck, unconformably. 

 According to this interpretation there are three distinct sets 

 of beds, all unconformable to each other, though the uncon- 

 formity is on a very small scale and what one would expect 

 in these deposits. It is easy to imagine that after the lower 

 red conglomerates and sandstones had been laid down, there 

 was a local deposition of this green series, perhaps very 

 limited in extent, and then, either with or without subsequent 

 erosion, a resumption of the deposition of the red conglomerates 

 and sandstones, leaving this green series as a lenticular mass 

 included in the red series. This, of course, is purelv and simply 

 a theory, but if it is true, this is a most interesting area. 



The small isolated patch of conglomerate at the top of 

 Hollin Gill is interesting in showing the manner in which 

 the conglomerate has filled in the small inequalities in the 

 old Silurian floor. 



{To be continued). 



The Microscope Shown to the Children. By E. Hawks. T. 



Nelson & Sons, 154 pp., 4s. net. With the aid of coloured and numerous 

 other illustrations, Capt. Hawks describes the charms of the microscope 

 and its revelations. Throughout the volume the author endeavours to 

 describe the various forms of animal and plant life in simple language. 

 We are glad to see our old friend Mr. Chas. D. Holmes has assisted in the 

 preparation of the volume. 



The Romance of the Microscope. By G. A. Ealand. See ley 

 Service & Co., 314 pp., 7s. 6d. net. The .sub-title perhaps defines the 

 scope of the book : — ' An interesting description of its uses in all branches 

 of science, industry, agriculture, and in the detection of crime, with a 

 short account of its origin, history and development.' Certainly Mr. 

 Ealand seems to have dealt with almost every possible aspect of micro- 

 scopic work — rocks, medicine, seaside life, chemistry, plant life, etc. 

 There are several suitable illustrations, 



Devonian Floras : a Study of the Origin of the Cormophyta. 

 By E.A.N. Arber. Cambridge ITniversity Press. 100 pp., 7s. 6d. net. 

 W'e should like to thank the Royal Society, Mrs. Arber, Dr. D. H. Scott 

 and the Cambridge University Press for making the perusal of this volume 

 possible. The late Dr. Newell Arber 's notes on this important a.spect of 

 paljcobotany were nearly ready for publication when his untimely death 

 prevented the memoir receiving his per.sonal revision. Still his work 

 is produced by careful and sympathetic hands, and in its present form is 

 a welcome introduction to the beginnings of plant life. There are several 

 illustrations. 



South African Mammals : A Short Manual for the Use of Field 

 Naturalists, Sportsmen and Travellers. By Alwin Haagner. 

 London : H. F. and C, . Welherby. .24.S pp. 20s. net. Thf Director of 

 the National Zcxjhjgical (hardens of South .\frica is particularly well 

 (jualiiicd to write on the mammals of this area. The book is on sound 

 scientiftc lines ; mammals large and small are dealt with, and his 

 descriptions are illustrated from photographs of living animals and of 

 trophies. The book will particularly appeal to the great number of public 

 and private ' trophy ' owners, and museum curators part icu huh- will 

 find it of service. The book is well produced. 



Naturalist 



