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different forms of medicinal preparations, fermented and dis- 
tilled liquors, paper-making and similar operations. Special 
cases and mountings are usually required and the realization of 
the plan will be necessarily expensive and slow, and must depend 
chiefly upon the good offices of liberal-minded manufacturers. 
In this line is the exhibition of tools and implements of aboriginal 
origin, as well as illustrations of the life-histories of plants from 
seed to finished pro 
The education of ae public in relation to plants injurious 
to mankind, isi the broadest view of that subject, is of the 
ates Eide At the beginning of this article it was re- 
arked that the cm between plants useful and plants 
aureus to man were not always clear. It is, of course, 
obvious that an arrow used in warfare is both atthe same time, 
s is the poison upon its tip. But it is equally true that this 
poison, ee if applied in one way, becomes a most powerful 
curative agent if applied in another. It may be stated that 
early all our well- known poisonous substances can be utilized 
as medicines, and that a very arge number of medicines are 
poisonous under suitable circumstances, Of a a facts 
owle of the eral character. Not so the fact, 
knowledge t gen 
equally well established, Fe nearly all disease is the oe 
tion of poisoning by plants. Reference has been made in the 
preceding remarks to the fact that the properties of plants do 
ot depend upon their entire substance, but only upon certain 
constituents. In the case of poisons, these constituents can be 
amounts, Of strychnine seeds, for ce, many grains are 
required to produce a fatal result, yet one-tenth of a grain of the 
extracted strychnine is a: c it is safe to administer at a 
mu 
e strychnine plant can flourish without injuring 
either itself or its neighbors by its poisons. It transfers them as 
waste products to its leaves and seeds, which, falling, permit the 
poisons to be decamnposee and destroyed in the soil. If we 
ing in vast numbers 
could imagine th plants as gro 
in the tissues of some gigantic animal, it is plain that the latter 
would in time become poisoned by the accumulation in its sys- 
