REVIEWS. 229 



the Preface, that *' The scientific method of observation and induction should be 

 used in elementary astronomy as in other physical sciences. Celestial pheno- 

 mena must be observed before the theories that explain them can be properly 

 understood." The first chapter deals with star groups and the apparent diurnal 

 motion of the celestial sphere. In the second chapter it is shown that all the 

 phenomena previously described can be explained by the fact that the earth is 

 a globe in rotation. The determination of the size and mass of the earth is 

 the subject of the third chapter. Then comes an account of the apparent 

 motion of the planets. And, finally, it is shown in Chap. V. that the appear- 

 ances are easily explainable on the Copernican theory of the order of the uni- 

 verse. There are 36 illustrations. 



Popular Science. By John Gall. Post 8vo, pp. 196 

 (London: Thomas Nelson and Son. 1895.) 



This is another of those very useful ' ' Royal Handbooks of General Know- 

 ledge," in which the author brings together in Alphabetical or Dictionary form 

 a manual of useful information on various branches of science, his aim being to 

 pro\dde a handbook containing short summaries of facts and principles specially 

 adapted for beginners in the study of science. There are a great number of 

 illustrations. 



Cassell's New Technical Educator. Monthly, price 6d. 



No. 29 (the last part to hand) contains chapters on Steel and Iron ; Coach- 

 making ; Coal-mining ; Allotment and Cottage Gardening ; Design in Textile 

 Fabrics ; Building Construction ; Gothic Stonework ; Weaving ; Engineering 

 Workshop Practice ; Civil Engineering ; Gas and Oil Engines ; Printing ; 

 Electrical Engineering ; and Dyeing of Textile Fabrics. There are a number 

 of illustrations. The frontispiece, "Bridges," shows some of the essential 

 details in Bridge Construction. 



Lectures on the Darwinian Theory, delivered by the late 

 Arthur Milnes Marshall, M.A., M.D., D.Sc, F.R.S., etc. Edited by C. F. 

 Marshall. 8vo, pp. xx. — 236. (London: David Nutt. 1894.) 



We regret that in our notice of this book in our last issue we quoted the 

 price as 6/- ; it should have been ^jS. 



A Text-Book of Sound. By Edmund Catchpool, B.Sc. 



Lond. Crown 8vo, pp. viii. — 203. (London: W. B. Clive. 1894.) 3/6. 



This is one of the University Tutorial Series. In it the author has tried to 

 keep in view the following aims : — I. — To include all the facts of which a know- 

 ledge is expected in elementary examinations ; II. — To present a clear picture 

 of the external physical processes which cause the sensation of sound ; and 

 III. — To keep before the reader the distinction between phrases which describe 

 actual processes or conditions, and those which, while they facilitate the predic- 

 tion of real processes and real phenomena, do not themselves stand for any 

 physiological condition or event. There are 73 illustrations. 



Intensity Coils : How Made and How Used. By " Dyer." 



Seventeenth edition. 8vo, pp. 79. (London : Perkin, Son, and Rayment, 

 99 Platton Garden. 1891.) Price i/- 



This useful little book gives descriptions of Electric Light ; Electric Bells ; 

 Electric Motors ; The Telephone ; The Microphone ; and The Phonograph. 

 There are 184 illustrations. 



Beginner's Guide to Photography, Showing How to Buy a 

 Camera and How to Use it. Crown 8vo, pp. 119. 



