SCIENCE AND INDUSTRY. 
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Modern Brickmaking, by, Alfred B. Searle, pp. x --500, with 310 illustrations. 
London: Scott, Greenwood & Son, 8 Broadway, Ludgate Hill.—Since the first 
publication in 1911 of his work on the processes, machines, and kilns used in 
the brickmaking industry, a considerable amount of information relating ‘to 
clay working has accumulated, and this has been included in the second edition. 
It constitutes most of the new matter now brought before the public. At the 
same time, however, the whole work has been revised, corrected where necessary, 
and partly re-arranged. Modern methods of manufacture, both in Great Britain 
-and in Europe, are discussed; and the illustrations are of great value in 
explaining the operation of much of the machinery referred to. A careful 
perusal of the book should enable any person acquainted with the rudiments of 
the subject to follow the discussion of the various features dealt with, and to 
make use of such methods as are new to him. 
A Treatise on Surveying, Vol. IL, by R. KE. Middleton, M.I.C.B., and 0. 
Chadwick, M.I.C.E., London K.: F.-N. Spon Ltd., 1920. p. viii. + 357.— 
In its original form, this book was the work of a number of authorities, each 
writing more or less independently, and with a very exact idea of the contribu- 
tions from one another. ‘This naturally resulted in certain defects, and in the 
present edition, Mr. M. T. M. Ormsby, Reader in Surveying at the University 
of London, has succeeded admirably in revising and bringing the previous edition 
up to date, and in removing these defects. The information contained in the first 
volume is sufficient to meet the requirements of students entering for the less 
difficult examinations in surveying, and of young engineers in countries already 
mapped; whilst the present volume supplies the additional information required 
for the more advanced examinations, and for work in unmapped districts, as 
well as serving as an introduction to the study of higher geology. The whole 
work has been re-arranged, and nothing of special value omitted. A great deal 
of new matter has been added. In particular, the following may be mentioned:— 
(a) A chapter on the History of Surveying, written by Mr. KE. H. Sprague, 
A.M.LC.E., Lecturer on Surveying at the Westminster Technical. Institute: 
(b) The method of least squares has been explained, and several worked examples 
given; (c) The adjustment of the errors in a triangulation has been treated 
much more fully than before; (d) The number of worked examples has been 
largely increased. The additions enhance very considerably the value of the 
original work, which was prepared under the xgis of the Council of the Sur- 
yeyors’ Institution. 
Model Aeroplaning: Its Practice and Principles, Wy V. E. Johnson, Mea. 
London E.: F. W. Spon, 1920. Pp. vi. + 257.—This is the second edition of a 
book first published in 1910. In an introduction, the author states that since 
that time great progress has been made in model aeroplaning, and he refers to 
the importance which he considers models are likely to play in the future develop- 
ment of aeronautics. In England, model aeroplaning has come into some | 
prominence as a pastime, and a number of clubs for this purpose have heen 
established. The Royal Aero Club has established a Kite and Model Aeroplane 
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