CURRENT LITERATURE. 
BOOK REVIEWS. 
The physiology of plants. 
Another part of the new edition of Pfeffer’s text-book of plant physiology 
has recently been published. This is the first part of Vol. II, which 
with energy exchanges in the plant. The first volume appeared in 18977 
This part embracesten chapters, headed as follows: I. Movement of growth; — 
II. Mechanism of growth; III. Growthand cell division; IV. Elasticity and 
cohesion in the plant body; V. Tissue tensions; VI. Influence of external 
conditions upon growth; VII. Internal causes of specific configuration; e 
VIII. Variation and heredity; IX. Rhythm in the processes of growth ; and : 
_X. Power of resistance to extreme conditions, The subject-matter has been” 
Bey rewritten, so that the present edition is quite distinct from the former 
i The treatment is divided into topics which are numbered consecuti 
@ throughou the volume, regardless of chapters. 
nie The literature is sceity weil besa up to the date of p 
and citations by footnotes are verynumerous. The practical value 
. a quite usual with Pate seth ae discussion often goes sO ye : 
2) eek wy Promising lines for future research, ee also the ible 
. able r 
; of statement. ‘The atonal | iovalved ent es 
FER, W., Plansenphysiclogc, ein Handbuch. der 
Keafechs! in der Filanze. Cates voll ig umg 
