Viil INTRODUCTION 
which make for the preservation of the individual 
and of the race. The second part, dealing with the 
Life-History of the Herb Robert and its relatives, 
will, I hope, convince both teachers and scholars how 
much may be learnt from a careful study of a single 
member of our common British plants. Such an 
intensive study of the growth to maturity of a plant 
involves a realization of all the factors which mould 
the various organs. This method of minutely follow- 
ing the life of a plant through all its varying stages 
has been adopted with considerable success in at 
least one school with which I am acquainted. I 
warmly recommend the particular example described 
in this work to the attention of teachers and to all 
who desire to become acquainted with the many- 
sided activities of one of our common, but, at the 
same time, one of the most attractive of Flowering 
Plants. 
F. E. WEISS. 
THE UNIVERSITY, 
MANCHESTER, 
November 27, 1918. 
