1902) CURRENT LITERATURE 31. 
Strasburger’s published views. The addition of subject-matter more suited 
toa text-book is also to be criticised, since it makes the work too long for a 
manual, without being full enough for a text. These liberties seem hardly 
justified by the translator's remark in the preface that “the curious in such 
matters can doubtless disinter them (the translator’s additions) by a compari- 
‘Snof the first English edition (in which all such additions sin in square 
brackets), and of the German third edition, with the present issu 
While the fact that the translation has reached a fifth prin indicates 
: that there is a demand for Professor Strasburger’s Practicum in English, we 
_ believe it would have been better to have presented simplya translation, with 
a appendix indicating English and American types which could be sub- 
stituted for the German forms when the latter are inaccessible.— CHARLES 
|, CHAMBERLAIN. 
Engler and Drude’s “‘ Vegetation der Erde.” 
: THREE wore VOLUMES of this most important series have sppeseel 
ately, making five volumes already issued.4 The recent treatises are on the 
oe by Radde, on the Illyrian countries by Beck, and on the 
“orth German heath by Graebner. Radde’s work‘ alone will be considered. 
ape ealy attention to the others may be expected. In the historical 
reed to see the immense number of botanists who have 
Toar _in the Caucasian region of Europe and Asia; one of the first was 
eo in 1717, another was the Russian botanist Giillenstadt in 1787. 
a ‘recently Ledebour, C, A. Meyer, Ruprecht, Trautvetter, Albow, Krass- 
Ss host of others have made this region well known botanically. 
mself has written a large number of botanical papers oe to 
having worked there since 1854. a 
ena deals with the steppes, which are found in their perfe: ao) 
= Caucasus mountains. As elsewhere, the steppes of Caucasia ee 
very recent oe origin; the famous “black earth” is the ee Le 
me areas are present in some places, the latter especially near the 
en here artemisias now occur, halophytes were once present; 
"or fA fie tea, and still further back freab water lakes Thus - : 
Gaz, 26: 356. 1898, = 
. Gustav, Grundziige der Pflanzenverbreitung in 
uateren Wolga iiber den Se bis 1 
ims Pp. gs with 13 text figures, 7 he! 
I 
