372 BOTANICAL GAZETTE [NOVEMBER 
the central pine belt, the central prairie region, and the maritime pine 
region. 
The systematic catalogue occupies 682 pages, and is a model of pains- 
taking care in the way of bibliography, synonymy, and range. The thallo- 
phytes number 1722, and notably full is the list of fungi by F. S. Earle, and 
the list of lichens. The bryophytes number 166, the pteridophytes Iog, the 
gymnosperms 13, the monocotyledons 681, and the dicotyledons 1782. 
total enumeration of species and varieties is 4473. About ten new species 
are described, but very many described elsewhere are founded on Dr. Mohr’s 
material. The three endemic species are 7yichomanes Petersii, Croton Ala- 
bamensis, and Neviusia Alabamensis. The sequence is that of Engler and 
Prantl, and the nomenclature is that of the Rochester code. 
It is a matter of great regret that the author was not spared long enough 
to receive the congratulations of his associates upon the appearance of his 
monumental work.— 
Methods in plant histology.® 
As STATED in the preface, this work has grown out of a course in histolog- 
ical technique given by the author to his classes in the University of Chicago 
and to its non-resident students taking work in this subject through the 
Extension Division. A series of articles on the same subject published by 
the author in the Journal of Applied cade forms the basis of the 
present volume. 
The first part of the book, about one-third, is devoted to the discussion 
of apparatus, reagents, and most of the important methods of killing and 
fixing, staining, sectioning, and mounting plant tissues and the lower forms 
of plant life. The chapter on apparatus is short, and much could be intro- 
duced that would enable the student who has not a complete laboratory 
equipment before him to save time and material and also produce more 
perfect results. The chapter on reagents seems unnecessary, as most of the 
matter is repeated elsewhere in the book. The description of the paraffin 
method is most complete and very carefully prepared, while the treatment 
of the celloidin method is hardly adequate, and does not give the more recent 
improvements that contribute so much to the successful use of this method 
in plant histology. The treatment of the methods of killing, fixing, and 
staining is admirable. 
Part II is devoted to the study of types of the various groups of plants 
systematically arranged and illustrated by specimens easily collected by any 
one familiar with the main divisions of the plant kingdom. The directions 
for the treatment of the material used in these studies are excellent, and the 
‘CHAMBERLAIN, CHARLES J.: Methods in plant histology. 8vo. pp- Vi--159- 
figs. 74. Chicago: The University of Chicago Press. 1901. $1.50 
