Mr. Edward Arnold's List of New Books 13 
WOOD. 
A iMManual of the Watural history and Fndustrial Applications of 
the Timbers of Commerce. 
By G. S. BOULGER, F.L.S., F.G.S., A.S.1., 
Proressor oF BoTAny AND LECTURER ON Forestry tw THE City oF Lonpon COLLEGE, 
AND FORMERLY IN THE RovAL AGRICULTURAL COLLEGE. 
New Edition, Revised and Enlarged and profusely Illustrated. 
Demy 8vo. 12s, 6d. net. 
Of the many thousand different kinds of wood, the author deals 
with some 750 of those which are practically known in general 
commerce. The book is divided into two sections. The first de- 
scribes the structure and development of trees, followed by chapters 
on the recognition and classification of woods, selecting, seasoning, 
storing, defects, methods of testing, etc. The second section, com- 
prising more than half the book, gives condensed accounts, with 
physical constants, when these are known, of the different woods of 
commerce, and will prove most valuable for purposes of reference. 
In an appendix will be found nearly fifty full-page illustrations of 
magnified sections of all the principal woods of commerce. 
ORGANIC CHEMISTRY 
FOR ADVANCED STUDENTS. 
By JULIUS B. COHEN, Pu.D., B.Sc., 
PRoFEssoR OF ORGANIC CHEMISTRY IN THE UNIVERSITY OF LEEDS, AND ASSOCIATE OF OWENS 
CoLLEGE, MANCHESTER. 
Demy 8v0. 21s. net. 
The book is written for students who have already completed an 
elementary course of Organic Chemistry, and is intended largely to 
take the place of the advanced text-book. For it has long been the 
opinion of the author that, when the principles of classification and 
synthesis and the properties of fundamental groups have been 
acquired, the object of the teacher should be, not to multiply facts 
of a similar kind, but rather to present to the student a broad and 
general outline of the more important branches of the subject. This 
method of treatment, whilst it avoids the dictionary arrangement 
which the text-book requires, leaves the writer the free disposal of 
his materials, so that he can bring together related substances, 
irrespective of their nature, and deal thoroughly with important 
theoretical questions which are often inadequately treated in the 
text-book. 
