1902] CURRENT LITERATURE 163 
characteristics, and other details more or less obscured during the summer 
months. As Sargent says in his introduction to this work, ‘ For the student 
of trees searching for accurate knowledge it is as important to study trees in 
winter as in summer.” While the book has undoubted scientific value, its 
great value will lie in its bringing many into a little closer touch with nature. 
= The half-tone illustrations from actual photographs are remarkably good, 
3 bringing out details very clearly, for which no doubt the publishers deserve 
_____ fauch credit. The colored plates, in so far as I am able to judge, are true to 
: nature. Print, paper, and binding leave nothing to be desired. —ALBEkT 
SCHNEIDER. 
Cellulose. 
IN 1895 Cross and Bevan published a large work under the title Ce//udose, 
an outline of the chemistry of the structural elements of plants. Although 
that work was €specially intended for chemists, it proved of assistance to 
physiologists who were concerned with this substance in its structural rela- 
tions to have the chemical data brought together in a connected way. The 
“me authors now issue a work entitled Researches on cellulose, 1895-1900, 
which is intended as a supplement to the former one. It gives a brief account 
researches which have been published between the dates named, as 
 Wellas 
certain of the authors’ own investigations not previously published. 
- attempt has been made to give the subject-matter the form of a connecte 
The papers are presented in abstracts, some very brief, some much 
longer, but all without comment, The book serves well to show the ae 
a ‘in which investigation is proceeding, and also the advances made — oS 
eee application of chemical knowledge. It would be well for 
_.  e ‘© familiarize themselves more thoroughly with the chemistry of ee 
ee We should then hear less about the cell wall being ‘composed of 
: 
a oe ich, from a chemical point of view, tells as little about it as to 
. @ house is built of stone tells of its materials or its architecture. 
loses, and po. nt? the cellulose of fungi, the hemicelluloses, lignocellu- | 
Peony Pécto-celluloses are contributions to plant physiology as sires ees 
ORS oe In spite of its technical character the book is one which —— 
ees "8 should have.—C. R. B, | ee 
NOTES FOR STUDENTS. 
has published a very full account of the plants 
NK Coney 
ding ne 
Sey endocino county, California, The numbers of plants : 
ay Raed were put, are amazing to those not fam’ 
and BEVan, E. J: Researches on cellulose, 1895-1900. 8vo, pp. 
» New York, and Bombay: Longmans, Green, and Comp 
. - = Nat. Herb. 7: 295-408. pls. 10-21. toon ee - 
