. 
402 The Botanical Gazette. [October, 
also, and, one question leading to another, deeper and deeper 
into the investigation of the processes involved in the repro- 
duction of the flowering plants, and of their significance. 
These studies naturally and-early led to the investigation of 
the cell-contents, and especially of the nucleus, whose funda- 
mental importance in the activity of the cell becomes so 
quickly apparent to the student. And it is perhaps through 
his work upon the indirect division of the nucleus that his 
name is most widely known. Prof. Strasburger himself states 
that his attention was first attracted to the karyokinetic fig- 
ures by their conspicuousness in the endosperm of certain 
Conifer, and their superficial resemblance to the figures 
formed about the poles of a magnet. Studies of the cell con- 
tents inevitably brought up also questions as to the structure 
and growth of its wall. Apart from the two related lines of 
research just indicated, his chief work has been that which 
has resulted in his classic volume on the structure and func- 
tions of the vascular bundles in plants, which is also the bulk 
iest of his publications; so that he always refers to it in con- 
versation as ‘‘Mein grosses Buch.’ : » of 
Just outside the corporate limits of Bonn, in the subur he 
Poppelsdorf, stands the ‘‘Poppelsdorfer Schloss, uP 7 
ce 0 
beginning of the present century a summer pala ns 
Archbishop-Electors of Cologne. It is a huge square buila 
ing of two stories, about a central circular c ee! 
pied by the Natural History department of the university, 
containing also the residence of the professor of b 
botanical establishment occupies the entire uppet 
of the northeasterly or front side. 
ing was erected in the first half of the last centu 
quite another use, will explain why it is poorly a pe 
laboratory purposes. Yet, since the windows are pegs 
one finds abundant room and all necessary apparatu tudes a 
no reason for complaint. The Botanical Institute ! ae a 
lecture room, well supplied with wall charts and diag 
laboratory for elementary and one for advanced ang 
private rooms for the professor extraordinarius, Prot. ratus 
per, and for the assistant, besides storage room for app? 
reagents and alcoholic material. -. residence 
Prof. Strasburger devotes the two rooms of ms rving 3 
which adjoin the institute to his own work, one - 
