360 THE JOURNAL OF BOTANY 
the chemical eae of ih ce he gives = neerye tir of 
oe rious farm crop under 
the heading of Sivaheilions, te adds careful aad “fall disteusiaall 
as to the best motlibas of budding and grafting. The final chapter 
in this division deals with bud- os: and sports, owith some 
account of how varieties are produced. 
The second half of the back i is concerned almost teh nes 
a detailed = tere of special plants, s , mangel, bevtiey 
grasses, clovers, &c. It is ets ceipennd to bear in mind, when 
deciding on the value of grasses and clovers for pasture, that the 
plants that sane eid cattle foul eat should be employed, while 
those only that are invariably rejected by stock should be excluded. 
What an old writer called the “ bateableness ” of particular grasses is 
their highest recommendation. Tried by this standard, Mr. Percival’s 
condemnation of zig-zag clover, Trifolium medium, is hardly justified, 
as stock eat it readily. Itis thes same with y arrow, the use of whic 
become matted together, more go than the seeds of P. pratens 
The last short section (part Vii.) deals with Fungi and Bacterial 
both treated from an economic oint of view, the former more 
many apt practical examples that follow each discussion 
form a res and admirable feature of the book; they enable 
the student to verify ‘practical: the statements in "the ae and 
illuminate the subject in Sore admirable manner. The illustrations 
are numerous, and have the great virtue of being all new; but, 
though printers and babies have done their work well, justice has 
hardly been done to Mr. Percival’s drawings; some of the repro- 
ductions are biorted and weak. A good index is provided, but we 
should also have liked a bibliography, without which such a work 
is hardly complete. Ackil 
