chemical analysis. As a result, it has been found that 
poisonous seeds in injurious quantities have been included 
with great frequency in our commercial feeds, giving rise 
to fatalities and disease, the cause of which was hitherto 
unsuspected. The loss in Canada has been so great that, 
after thorough investigation, the Department of Agricul- 
ture has designed a new feedstuffs act with a view to its 
prevention, and established a micro-analytical laboratory 
for the enforcement of the statute. In the fourth Section 
are grouped the plants that, although poisonous, rarely 
cause the death of animals. It comprises by far the larg- 
est number, including some that are the source of medic- 
inal drugs, others that have large amounts of virulent 
poison, and many that are poisonous only if taken in 
quantity—all not sufficiently attractive to animals to be 
the source of much danger... Previously considerable con- 
fusion resulted from bulking, without discrimination, all 
the plants that contain poison. It is hoped that the 
arrangement followed in this book will be found of prac- 
tical value, by avoiding this difficulty and rendering the 
determination of .the plant easier. The medical profes- 
sion should find Section IV of most interest since the 
plants. that are mainly responsible for poisoning in man 
are collected here. (See p. 109.) ~ 
The illustrations are from photographs and drawings 
made. especially for the book. By means of these and by 
the classification into the groups above referred to, it 
should be possible for an amateur to identify the plant 
responsible in an ordinary case of poisoning. No key 
based on botanical characters has been included, since 
such a key would be impracticable because of confusion 
with the numerous non-poisonous forms. At the end of 
‘the book, however,. a “symptoms” key has been added. 
‘Such. a key. ‘cannot, in. the present state of our know- 
ledge, be made precise. Its purpose is merely to facili- 
