132 BOTANICAL GAZETTE (rEpRvany 
Dr. Rothrock has not attempted a technical discussion of the forestry problem; 
his evident aim is to educate the people to an appreciation of the importance 
and value of the forests, a purpose the report is well calculated to serve. 
The second volume is a modest pamphlet of fifty-five pages, but to th 
teacher of forest botany, and the student of legislation for forest protect 
it is the more notable utterance of the two. In addition to a preliminary 
report as forestry commissioner, there is a popular essay on the relation # 
forests to the farmer and an excellent article on the removal of the feriit 
resembles that of the hickory nut, is described and figured, as is also a weil 
(Echium vulgare) new to the state. “i 
In his report Dr. Rothrock discusses a practical method of securing reli 
ble data of the various classes of timber land in the state — information 
heretofore available—taxes on forest land, forest reservations, forest fire 
legislation, and forests and floods. The report, though brief, is by far the 
best presentation of forestry needs that has yet appeared, and should have 
wide publicity — CHARLES A, KEFFER. 
| 
| 
The physiology of plants. 7 
a position in the literature of plant physiology, it is to be expected i — 
much more extended one will rightfully maintain the place its predecess 
The volume before us is devoted to the discussion of the moveme 
transformations of matter (Stoffwechse/) » the second, which is in pre a 
's to discuss the transformations of energy (Kraftwechsel). After a at is 
ductory chapters, the following are the main headings: Die Mechanl® 
Stoffaustausches ; die Mechanik des Gasaustausches ; die Wasset ae. 
in der Pflanze; die Nahrstoffe der Pflanze; Bau und Betriebsstoflw ‘al 
Athmung und Gahrung ; Stoffwanderung. Although so greatly exten’ | 
will be observed that the same general mode of treatment has been tee ie 
While details have been much altered, the fundamental outlines ron . 
same. : 
r i : -guthot 
What one feels most strongly in going through the book is that the 5 
ig FEFFER, W., Pilanzenphysiologie, ein Handbuch der Lehre vom 
und Kraftwechsel in der Pflanze. Zweite vollig umgearbeitete Auflage- 
Stoffwechsel, 8vo., pp. x + 620, figs. 70. Leipzig: Wilhelm Engel 
M 20. (Bound, M 23). 
