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POPULAR SCIENCE REVIEW. 
is growing larger by a kind of vital action ; nor do we think that be will do 
much to stem the current of scientific scepticism which has disturbed his 
peace of mind. The astronomer, not less than the geologist, will have many 
a bone of contention to fight over with Mr. Ward. 
STEAM AND THE STEAM-ENGINE* 
A CCORDING to the title-page of the new edition of Dr. Evers’s Steam, 
- the work has now reached its twenty-sixth thousand. We may 
therefore take it that in the keen struggle for existence among the many text- 
books which crowd the market, Dr. Evers’s work has shown healthy vitality, 
and has asserted its right to live and to take rank among our standard 
manuals. At the time of its first appearance there was no work of its kind 
— at once comprehensive and cheap — and Dr. Evers supplied a want which 
had been felt, especially by classes working in connexion with the Science 
and Art Department. Primarily intended for use in such classes, it by no 
means servilely follows the Syllabus of the Examinations, and certainly 
stands above a cram-book for use in preparing for the May ordeal. The 
new edition has been revised, and has received the benefit of an additional 
chapter on compound engines. 
EXTINCT BRITISH ANIMALS. f 
M R. HARTING opens the introduction to his treatise on recently 
extinguished British Mammals in the following words : — 1 The 
interest which attaches to the history of extinct British animals can only 
be equalled by the regret which must be felt by all true naturalists at their 
disappearance beyond recall from our fauna. It is a curious reflection at the 
present day, as we pass over some of the wilder parts of the country, that at 
one time these same moors, and woods, and glens, which we now traverse so 
securely, were infested to such an extent with ferocious animals, that a 
journey of any length was, on this account, attended with considerable 
danger.’ It needs the spirit of the true naturalist to regret the change that 
has taken place. 
Either as naturalist or sportsman, however, Mr. Harting revels in the 
ideas thus conjured up. His imagination brings before him scenes which, to 
* Steam and the Steam-Engine; Land, Marine, and Locomotive. By 
Henry Evers, LL.D. {Collins' Advanced Science Series ). 8vo. London: 
W. Collins and Sons. 1880. 
t British Animals extinct zvithin Historic Times, with some accounts of 
British Wild White Cattle. By James Edward Harting. 8vo. London : 
Triibner & Co., 1880. 
