102 THE AMERICAN NATURALIST. (VoL. XXXIX. 
BOTANY. 
Silviculture.‘—Silviculturists and others interested in forest 
management will welcome the second part of Professor Mouillefert’s 
comprehensive treatise which is now out. The first part havingc on- 
sidered in much detail from the forester’s point of view the most 
important tree species, this second part deals especially with the 
management and exploitation of trees in assemblages or forests. 
After defining precisely the terms used, the author considers most 
comprehensively the principal methods of developing and harvesting 
the two forms of wood, high forest and coppice, and the application 
of these methods to the principal species of trees; gives advice as 
to what to seek in any given case, and describes the nature and 
amount of the product to be obtained, giving volume curves, direc- 
tions for developing a forest working plan, calculations of annual 
revenue, and so on. Special chapters deal with the cultivation of 
osiers for the draining of soils and with the culture of truffles. The 
chief modes of cropping and marketing forest products are also 
taken up. 
While special parts, such as rules for forest management and the 
tables of annual returns, are based upon conditions different from 
our own (it being possible by reason of the centuries of forestry 
practice in France to lay down rules of practice and estimate yields 
much more definitely than with us) nevertheless the general aspects 
of the subject, the principles of the science and art of silviculture 
are set forth so clearly and simply that the book is bound to be of 
general interest to foresters and students of forestry in this country. 
It will be particularly helpful in making clear to many certain sides 
of the subject, such as the mathematics of forest measurements, 
which, as they are often set forth in works on forestry, are not likely 
to be easily understood. 
C. S.» 
Notes. — Loeb's St. Louis address on the recent development of 
biology is printed in Science of December gth. 
An important addition to the rather abundant recent literature of 
apogamy is made by Strasburger, in a study of Alchemilla published 
in the opening number of Vol. 41 of the Jahrbücher für wissen- 
schaftliche Botanik. 
! Mouiilefert, P. 7vai/é de Sylviculture — Part 2 — Exploitation et A ménagement 
es Bois. Paris, Alcan. 1904. 12mo, 476 pp., 10 pls. 97 figs. 
