914 THE JOURNAL OF BOTANY 
indexes: the present arrangement, necessary when it was in two 
independent parts, is inconvenient in its present form. But it is 
an excellent book, and will form a useful and attractive present 
for young people. 
Dunkelfeldbeleuchtung wnd Ultramikroskopie in der Biologie und 
im der Medezin. By N. Gatpuxov. Jena: G. Fischer. 
1910. 8 marks. 
reason to believe that it is destined to throw light on that much- 
discussed problem—the structure of protoplasm 
he conclusion reached by Gaidukov is that cytoplasm consists 
of a celloidal complex made up of a reversible and an irreversible 
part, and that the “plasmatic membrane” which invests the 
* gel,” 
be use 
written and ma recommended to all who are interested in the 
problem of biological science. 
BOOK-NOTES, NEWS, ¢ée. 
huge trumpet-shaped flowers of Gardenia hysophylla, and th 
heavily scented purple-splashed blooms of 'o. i br : 
