REVIEWS. 
79 
replied to their constant demands, and has produced a book which, 
in its first edition, may present a few failings, from the unquestionable 
novelty of the labours involved in its production, yet will, we doubt not, 
effect much good and save much labour to some, while opening a new path 
to others. The next edition will, we should think, soon have to appear, and 
then we shall expect a better lesson from its author. The book is divided 
into several chapters, and treats of the various subjects into which geology 
may be said to divide itself in a purely commercial fashion. Among these 
we would especially refer to the sections devoted to architecture, civil 
engineering, mining work, heat and light producing, grinding, fire-resisting, 
dyeing, heating, and other matters. In these will be found a whole 
host of matter which is not to be found readily elsewhere. We notice, too, 
that the author appends to each chapter a list of the more important works 
upon the subject to which it refers. The cuts are generally well-selected, 
but are not by any means numerous enough. Another suggestion we would 
make for the future edition, and that is, that some of the chapters should be 
made more thoroughly practical than they are. The book savours a little 
too much of the class-room } we would alter this as much as possible. 
ROFESSOR MIVAKT, F.R.S., has here given us a popular book on 
the anatomy of the common frog, which is undoubtedly an excellent 
work of the kind. It is not popular in the ordinary sense of the word, but 
is so, in that technical wording is absent, except in the description of the 
figures, where it is absolutely necessary. Further, the woodcuts are ample, 
and they have not been spoiled by an absurd diminutiveness, as is not unfre- 
quently the case. It is a subject not easy to deal with, and yet we think 
that Mr. Mivart has been most happy in discharging the task of teacher. 
The various groups allied to the frog are of course described, and on this 
subject some of the author’s own views receive discussion. After the general 
account of the commoner variety of frogs comes the description of the diffe- 
rent groups of anatomical facts. And we especially think Mr. Mivart is 
to be complimented on his treatment of the anatomy of the brain. This is 
dealt with comparatively fully, the figures helping the student to follow the 
points dwelt on in the text, and enabling him to contrast the brain of the 
frog with the brain of man in its earlier stages of development. The sum- 
mary of the anatomical points in which a frog differs from fishes, reptiles, 
birds, and mammals is a capital addition to such a book. 
* “ The Common Frog.'’ By St. George Mivart, F.K.S., &c. London: 
Macmillan & Co., 1874. 
TITE COMMON FROG.* 
