154 Review of Darwin's Theory on the Origin of Species. 
pended to the several chapters, and a general recapitulation eat 
tains the essence of the whole, yet much of the aroma escipts 
in the treble distillation, or is so concentrated that the flavor is 
lost to the general, or even to the scientific reader. The volum 
itself—the proof spirit—is just condensed enough for its put 
pose. It will be far more widely read, and perhaps will make 
deeper impression than the elaborate work might have done, 
with its full details of the facts upon whieh the author's swee 
ing conclusions have been grounded. At least it is a more Te 
able book: but all the facts that can be mustered in favor of the | 
theory are still likely to be needed. . os 
_ Who, upon asingle perusal, shall pass jadgmes: a a work 
like this, to which twenty of the best years of the life 
able naturalist have been devoted? And who among 
naturalists who hold a position that entitles them to ae 
summarily upon the subject, can be expected to divest hi , 
for the nonce of the influence or received and favorite ope 
In fact, the controversy now opened is not likely to be | A 
in an off-hand way, nor it is desirable that it should be. - 
spirited conflict among opinions of every grade must ook 
which,—to borrow an illustration from the doctrine of the 
efore us—may be likened to the conflict in nature amone bso 
e duty of reviewing this volume in the American 
| wet 
whose wide observation and profound knowledge of various # 
partments of natural history, as well as of geology, pany 35 | 
sci 
Pp + 4 alisti€ 
could not be expected to accept its doctrine. Views $0 ideas 
as those upon which his “ Thoughts upon Species”™ ate 
ed, will not harmonize readily with a doctrine 80 thorn 
faturalistic as that of Mr. Darwin. Though it is just 
that one who regards the kinds of elementary anes these 
oxygen and hydrogen, and the definite compounds | inert 
elementary matters, and their compounds again, 1 te ames 
igdom, as constituting species, in the same sense, fu admit 
ly, as that of animal and vegetable species, might wel 8 
m of one species from another in the latter de 
Article in this Journal, vol. xxiv, P- 305. 
