1884.] REVIEWS OF BOOKS. 457 



vocation as sea fishing.' Hence there is an additional reason for the 

 publication of ' The Sea-Fisherman.' We give our hearty testimony 

 to the fact that this work is overflowing with information most use- 

 fully supplemented by illustrations, and we feel sure it must continue 

 to secure a large sale. 



Easy Lessons in Light. By Mrs. W. Awdry. Easy Lessons in Heat 

 By C. A. Martineau. London : Macmillan and Co. 



Both of these excellent little books are illustrated by diagrams. The 

 first on light gives chapters on refraction, reflection, on the undulatory 

 theory, on measurings, on diffraction, on the spectrum, and on the 

 rainbow. The one on heat discusses the expansive powers of heat, 

 temperatures, the spreading of heat in solids, ventilation, winds, 

 viscosity, freezing, latent heat, gas and vapour, freezing mixtures, 

 evaporation, boiling, geysers, vegetation, glaciers, and the thousand and 

 one subjects that bear directly or indirectly upon heat or its absence. 

 Nothing is healthier and better in the educational literature of the 

 day than the tendency to popularize the treatment of scientific sub- 

 jects, and the necessary cheapening of books which follows their 

 popularization. Books of the kind we refer to, like the two before 

 us, can be put in the pocket, and thus may afford instruction during 

 the course of a railway journey of only a few moments, and in time 

 that is too frequently altogether wasted. They deserve a large sale 

 and every encouragement from those they are intended to reach and 

 to benefit. 



Enquire Within upon Everything. Sixty-eighth edition, carefully 

 revised. London: Houlston and Sons, 1884. 



The fact that nine hundred and seven thousand copies of this well- 

 known book have been printed, is a sufficient proof of its immense 

 popularity. The notification, therefore, of a new edition will probably 

 be the occasion of a still larger demand for it, for there are, of course, 

 yet to be foundpeoplewho have not thebookin their possession, although 

 it would doubtless be difficult to find one person who has never seen it. 

 Besides the careful revision, which the present new edition has under- 

 gone, many additions have been made to the work, and the classifi- 

 cation of subjects has been improved in accordance with many 

 suggestions. Since its first publication the field of all * enquiry ' has 

 of course grown, and the editor has endeavoured to keep pace with 

 this growth. The volume, though moderate in size, .contains 388 

 closely printed pages, besides an index of 28 pages. Certainly this is 

 a book that no one should be without. 



