342 REVIEWS. 



The Theory of Light. By Thomas Preston, M.A. (Dub.). 

 Second edition. 8vo, pp. xyii. — 574. (London: Macmillan and Co. 1895.) 

 Price 15/- net. 



At the present time there are many text-books on light-. The majority of 

 them fall short of the requirements of those who wish to know how far investi- 

 gation has been carried, or in what direction it remains to be pursued, and which 

 of these are the most urgent and most likely to be attacked with success. The 

 author's aim in this book is to furnish the student with an accurate and con- 

 nected account of the most important optical researches from the earliest times 

 up to the most recent date. Although a large portion of the book will be found 

 suited to the reading of junior students, yet it will be found sufficiently full to 

 meet the requirements of those who desire a more special acquaintance with the 

 subject. This second edition has been thoroughly revised and more than 100 

 new pages added. There are about 250 wood-cut illustrations in the text. 



The Eye in its Relation to Health. By Chalmer Prentice, 

 M.D., Chicago. Svo, pp. 214. (Bristol: John Wright and Co. London: 

 Simpkin, Marshall, and Co. 1895.) Price 6/6. 



Many of the opinions advanced by the author are evidently original, and 

 some are even of a surprising nature ; nevertheless, the general tenour of the 

 book is scientific, and will doubtless repay a careful perusal. 



Murche's Science Readers. Books i, 2, 3. By Vincent T. 



Murche. Cr. Svo, pp. 127, 128, 176. (London: Macmillan and Co. 1895.) 

 Price i/-, i/-, 1/4. 



Three very interesting books of Object Lessons in Elementary Science, 

 dealing in a simple way with the commonest properties of bodies ; the nature, 

 growth, and structure of plants in general ; and some of the leading types of 

 the anima' creation. Each book is nicely illustrated. 



Lessons in Elementary Physics. By Balfour Stewart, M.A., 

 LL.D., F.R.S. Fscap. 8vo, pp. xii.— 475. (London: Macmillan and Co. 

 1895.) Price 4/6. 



A new edition of this work, in which many additions have been made, is 

 now before us. It brings before the student, in an elementary manner, the 

 most important of those laws which regulate the phenomena of nature. It 

 treats of Laws of Motion ; The Forces of Nature ; Energy ; Sound ; Heat ; 

 Radiant Energy; Electrical Separation; Magnetism, etc. There are 157 

 illustrations. 



An Introduction to the Science and Practice of Photography. 

 By Chapman Jones, F.I.C, F.CS., etc. Third edition. Cr. 8vo, pp. 326. 

 (London: Iliffe and Son. 1895.) Price 2/6. 



In this work the various cameras, lenses, etc. , are fully described, as are also 

 the numerous processes. Owing to the rapid advances made in the science of 

 photography, several new chapters have been added, and others carefully 

 revised. The formula for solutions are given in both the English and metric 

 systems. 



Nature in Acadie. By H. K. Swann. Cr. Svo, pp. viii. — 

 74. (London : John Bale and Sons, Oxford House, Great Titchtield Street. 

 1895.) Price 3/6. 



We have here very pleasingly told a narrative of a Nature-lover's first 

 voyage westward, with an attempt at the word-picturing of what he saw during 

 his sojourn in Nova Scotia^ or, as he poetically calls it, Acadia. 



