﻿Geological Soc'utg. 95 



Die Theorie, Berechnung und Konstruktion der Dampfturbinen. Von 

 Gabriel Zauikja^z. Mit 23 Textfiguren. Berlin : M. Kravn. 

 1906. Pp. iv + 179. 

 Engineers interested in the theory and design of steam turbines 

 will find in the small book under review an admirable account of 

 these subjects, the treatment being thoroughly scientific, and at 

 the same time clear and practical, the author being careful not to 

 introduce extraneous theoretical matter having no immediate con- 

 nexion with the subject in hand. Xo very advanced knowledge 

 of mathematics is assumed, and any reader having a knowledge of 

 trigonometry and the elements of the calculus should find no diffi- 

 culty in reading the book ; in fact, one of its chief merits is that it 

 appeals to a very wide circle of readers, and that the author takes 

 so very little for granted. All the more important principles and 

 rules of design established by the author are liberally illustrated 

 by fully worked numerical examples. 



The title of the book is, however, to some extent misleading : 

 for in a book which professes to deal with the construction of 

 turbines as well as their theory and design, one might not un- 

 reasonably expect to find some account of details of construction 

 and examples of modern types of steam turbine. Instead of this, 

 however, the part devoted to " construction " consists of a single 

 concluding sentence, containing, no doubt, a sound moral precept, 

 but hardly to be taken seriously as an account of the " construction" 

 of steam turbines. 



XV. Proceedings of Learned Societies. 



GEOLOGICAL SOCIETY. 



[Continued from Vol. xi. p. 616.] 



February 16th, 1906.— J. E. Marr, Se.D., E.B.S., President, 



in the Chair. 



TTHE President delivered his Anniversary Address, in which he 

 described the Influence of the Geological Structure of English 

 Lakeland upon its present Features. — A Study in Physiography. 



After a brief account of the light thrown upon the structure of 

 Lakeland by the writings of Otley, Hopkins, Clifton Ward, Good- 

 child, and Strahan, he considered his subject under the following- 

 heads : — 



I. Events prior to the Uplift -which produced the Dome. 

 II. Production of the Dome. 



III. Initiation of the Drainage-Lines. 



IV. Effects of the Three Types of Books upon the Scenery. 

 V. Modification of old Drainage-Lines. 



VI. Depression of the Outskirts. 

 VII. Effects of Meteorological Conditions. (1) General. 

 VIII. Do, Do. Do. (2) The Glacial Period. 



IX. Conclusion. 



Of the events prior to the dome-shaped uplift he laid greatest 



