138 PLANT PHYSIOLOGY, 
adapt themselves to the world about them. Briefly, it 1 
elementary text-book on a physiological basis, and at the same 
time a welcome addition to the long list of text-books, good, bad, 
and indifferent. 
he subject-matter is divided into four parts, under the headings 
“The Vegetative Body,’ ‘Physiology,’ ‘‘ Reproduction,” an 
*Keology.” Part I. consists of a short introductory chapter on 
preserving material, a list of apparatus and reagents, and 0 
reference-books, and an outline of classification. The last is 
based on the most recent German system elaborated in Engler and 
Prantl’s Pflanzenfamilien. The work concludes with a useful index. 
The text is profusely illustrated with figures borrowed from very 
various sources, which we are glad to notice are duly acknowledged, 
and the whole forms a neat and well-produced volume. 
m , is not included. The reason for this and other 
missions igs t e author has brought together only those 
publications which e appeared since his residence in Berlin 
twenty years makes a goodly show, and speaks well for the energy 
and devotion of its author. There are in all thirty-one papers, 
which, except for a few brief additional comments, reappear In 
their original form, presenting an excellent 
the literature of plant-physiology, especially to that of the 
mechanics of growth and movement; and botanists interested in 
their structure and mechanism are discussed; then half-a-dozen on 
“ Leaf-arrangement,” including researches into lateral outgrowths 
