LEHRBUCH DER BOTANIK FUR HOCHSCHULEN 868 
the nomenclature adopted is based on the rules formulated by Prof. 
Engler and some of the Berlin botanists, which were translated and 
commented on in this Journal for 1897, pp. 305-7, and which in- 
clude the ‘‘ fifty years’ limit,’’ numerous objections to which have 
been made, some of them formulated in this Journal for 1898, 
pp. 90-94. 
We do not think this limit is likely to be generally received or 
deserving of such acceptance, but, with this important reservation, 
we have nothing but praise for the full bibliography which the 
authors have given us in. this first instalment of their work. It 
will not, indeed, supersede Pfeiffer’s excellent Nomenclator Botanicus, 
which is on somewhat different lines; but as a compendious history 
Me genera it has no equal, and must find a place in every reference 
rar 
The present work, however, is more than a mere synonymic 
list of genera. The orders are divided into groups of diverse rank, 
and although no diagnoses are given, a full bibliography is appended 
to each; to each genus, in addition to this, is appended an estimate 
of the number of species it includes, and a brief summary of its 
geographical distribution. From this it will be seen that the Genera 
when completed will be invaluable as a work of reference, and will 
afford another example of that careful industry which, until the 
advent of Mr. B. D. Jackson, we were accustomed to think was not 
met with out of Germany. : 
The work is clearly printed in double columns, the type being 
well chosen and well selected. Only one detail seems to us un- 
desirable—the insertion of a colon after the word ‘‘in” in quotations 
such as the following: ‘ Nannorhops H. Wendl. in: Bot. Zeitg. 
Xxxvii. (1879) 147.” The fact that the date is in every case assigned 
to the publication adds materially to the usefulness of the work. 
Lehrbuch der Botanik fiir Hochschulen. Von Drs. HK. SrRaspuRGER, 
F. Nott, H. Scuence, & A. F. W. Scumesr. Vierte ver- 
besserte Auflage. 8vo, pp. viii, 588; figs. 667 (part coloured) 
ena: Fischer. 1900. Price 7 M. 50 Pf. (paper); 8 M. 50 Pf 
(bound). 
THe appearance of a fourth edition only about five years after 
the issue of the original must be a gratifying proof both to — 
ie . . 
can add little. The book has grown from 570 pages in ~~ third 
Many of the additions consist of coloured figures of poisonous or 
officinal plants in the section dealing with the classification of seed- 
plants ; in fact, this last part of the book is becoming quite a blaze 
of colour, and gives additional attraction to the study of systematic 
botany. 
We would again suggest the advisability of revising parts of the 
section dealing with physiology, especially as regards the process of 
