878 ELEMENTARY TEXT-BOOK OF AGRICULTURAL BOTANY. 
same space. The ‘roading’ or clearing of ditches and dykes no 
doubt influences this, and by depositing at certain points large 
masses of seeding plants perhaps produce the above result. Often 
in small masses, it can be traced to a single central plant. Dr. 
a certain extent. Thus the character of lacustrine botany is not so 
aoe the number of species, but the large masses of individual 
plants. 
Weber, a very rare French species. To the flora of France he has 
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ne would like to see a similar exploration of our British lakes. 
Ireland bids fair to have hers examined; will not some botanist 
give pea ie fremont and do some such work for the honour of 
y 
Artuur BENNETT. 
An Elementary Text-book of Agricultural Botany. B 
Y. M. C. Porter. 
M.A.,F.L.8. Methuen & Co. 8vo, pp. xii, 250 99 cuts. 3s. 6d. 
of the needs of the agricultural student, and therefore it supplies a 
want felt by those teaching in farming colleges and oehae ples 
_ +he iirst portion deals with the cell, and then treats of the root, 
skin and leaf, all from both physiological and morphological points 
of view; and the text is illustrated by figures from Sachs, Stras- 
burger, Detmar, Vines, and others. The reproductive portions 
fruit and seed—oceupy the next three 
e 
able to devote one chapter to it. Even so, it would surely have 
