No. 459.] NOTES AND LITERATURE. 175 
It is near the end of the book that the greatest change is to be 
noticed. In place of the eleventh chapter on tissues for special 
functions, we find the subject augmented to three chapters as follows : 
tissues for movement, sense organs, and tissues for conducting stim- 
uli. In the first is an account of the passive hygroscopic movements 
of certain plant parts, and of the active movement, as seen in pul- 
vini, stamens, etc. In the second is an elaborate treatment of the 
statolith theory, as well as descriptions of various forms of sensitive 
hairs and papilla. In the third part the writer considers the propa- 
gation of stimulus in Mimosa, and in his explanation adheres to his 
former point of view. Here also he gives an account of inter- and 
intra-cellular conduction of stimuli. 
Haberlandt's treatment of anatomy well deserves the prefix physi- 
ological, and stands, as it is intended to, in striking contrast to the 
mere topographical anatomy of many other writers. Any hard and 
fast system must naturally have a narrowing influence and a too 
ready acceptance of all the classifications of tissues and interpreta- 
tions of functions in Haberlandt's book would no doubt lead the 
reader into the sloughs of teleology. We can however make what 
reservations we wish in his causal explanations and still have left a 
wonderfully suggestive and stimulating analysis of the aspects of 
plant tissues, viewed from a functional standpoint. That the author 
may at times carry this idea of the purposeful development of tissues 
too far, cannot be denied, yet even this is better than a purely formal 
treatment of the subject from a regional standpoint only. At least 
there is impressed upon the reader that plant tissues have functions, 
and that these functions constitute a real interest in the study of 
anatomy. In these days of increased interest in physiological prob- 
lems and of the advance in knowledge of physiological processes, 
such a book as this will come more and more into consideration. 
The physiologist and ecologist, whether or no they always agree 
with the author, must frequently have occasion to consult the book 
and it may be suggested that the topographical and phylogenetic 
anatomist would do well to pay greater attention to Haberlandt's 
point of view. 
There is one thing omitted from the book which should perhaps 
have found place, namely, a closing chapter by way of a general 
summing up of the inter-relations of the various “systems,” so iet 3 
more complete picture of the plant as a whole might be obtained. 
The section of half-a-dozen pages in the first chapter, in which the 
physiological efficiency of the tissues is treated, does not fill the 
