1904] CURRENT LITERATURE 391 
In a third section, Energiewechsel, the author discusses movements of all 
kinds, whether due to warping, to growth, or to turgor variations. 
The scope of this work, its freshness, conciseness, and not least its clear and 
pleasing style, will commend it toevery reader. It is easily the best work on 
plant physiology in any language for thegeneral student. We hope that it will 
be translated promptly into English, though the necessity for this is not so 
great as in the case of some less readable works.— 
THE LAST PART of the second volume of Pfeffer’s Phlanzenphysiologie? 
has recently made its appearance from the press of Wilhelm Engelmann at 
Leipzig. Its publication, indeed, is almost simultaneous with the English 
translation of the first part of the same volume. e may therefore expect 
that the usual two years will elapse before this final part is translated into 
English. This portion is devoted entirely to the movements of plants, except 
a short chapter on the production of heat,-light, and electricity, and a synop- 
tical account of the forms and amount of energy exhibited in plants. In the 
discussion of movement one feels still more strongly the lack of coordination 
which is a marked characteristic of the whole work, The field in which there 
was needed the utmost clarity of statement and organization of facts is natu- 
rally the one in which the lack of such definite organization and clear pres- 
entation is most felt. But in spite of this serious fault one finds the same 
suggestiveness in the treatment of the various topics that has likewise charac- 
terized the preceding portions of the work. The same concise bibliography 
(notwithstanding the often incomplete citations) puts one into immediate 
touch with the more important literature. It is as impossible as it is unnec- 
€ssary to go into detail in reviewing this volume. The mere announcement of 
its publication is all that is needed to insure its purchase by every institution in 
which plant physiology has a place and by every student who touches more 
than the rudiments. And the German original is as important to o investi- 
gator as the more easily read translation.— C. R. B. 
THE SECOND INSTALLMENT of the English edition of Pfeffer’'s Physiology 
of Plants? has recently appeared. Its sub-title is Growth, reproduction, and 
maintenance. The present volume is both more and less than. a translation. 
Dr. Ewart’s aim has been to transfer the meaning into good English without 
undue regard to the original form, so that many of the involved paragraphs 
of the author may be said to be interpreted rather than translated. This is 
usually a distinct improvement, and can cause serious trouble only is 
those comparatively rare cases where the author's meaning is not quite 
* PFEFFER, W., eee ein pe der Lehre vom Stoffwechsel 
und aes in der Pflanze. Zweiter Ban Kraftwechsel. 2. p- 
8vo. Pp. xi+ 353 to 986. ae 60. Leipzig: (ee 1904. J/19. Parts 
T and 2 of Vol. II, 4730; bound 4733. 
3 Ewart, A. J., Pfeffer’s Physiology of Plants, Vol. Il. Growth, reproduction, 
_ and hee 8vo. pp. viii+296. fgs.37. Oxford: The Clarendon Press. 1903 
