LIBRARY 
NEW YORK 
BOTANICAL 
GARDEN 
*PREFACHE 
Tuts book is written upon the same plan as the author’s 
Elements of Botany. A few chapters stand here but little 
altered from the former work, but most of them have been 
rewritten and considerably enlarged, and many new ones 
have been added. The principal changes in the book as a 
whole are these: 
1. Most of the discussion of ecological pad is put by 
itself, in Part IL. 
2. The amount of laboratory work on the anatomy and 
physiology of seed-plants is considerably increased and addi- 
tional experiments are introduced. 
3. The treatment of spore-plants is greatly extended, so as 
to include laboratory work on the most important groups. 
4. The meagre Flora which accompanied the earlier book 
has been replaced by one which contains fairly full descrip- 
tions of nearly seven hundred species of plants. Most of 
these are wild, but a considerable number of cultivated species 
have been included, mainly for the convenience of schools in 
large cities. ‘ 
Ample material is offered for a year’s course, four or five 
ay periods per week. The author is well aware that most schools 
> devote but half a year to botany, but the tendency sets strongly 
—, toward allowing more time for this subject. Even in schools 
o> where the minimum time allowance is devoted to botany, there 
> isa distinct advantage in being provided with a book which 
= allows the teacher considerable option as regards the kind 
‘and amount of work which he shall offer to his classes. 
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