630 : GRAPE DISEASE. 
In this manner our root-louse was known and studied in a 
foreign land before its presence was even suspected in this—its 
native country. ` 
Conciuston — No Neep.or Unnecessary ALARM.— Knowledge 
of the facts I have here brought forth need not alarm the grape- 
grower any more than correct knowledge of some indisposition, 
hitherto incomprehensive and consequently uncured, should alarm 
the human patient. It was only a few years ago that our eyes were 
opened to the true character of the entozoon known as Trichina 
spiralis, and there can be little doubt but that previous to our 
knowledge of this parasite many a death occasioned by it was 
attributed to other unknown causes. It may not be more easy to 
cure the disease now than it was formerly, but we are, by under- 
standing its nature, enabled easily to guard against and prevent it. 
“ Full knowledge of the truth,” says Helmholz, “ always brings 
with it the cure for the damage which imperfect knowledge may 
occasion.” The Phylloxera has always existed on our vines, and 
those varieties which in the past have best withstood its attacks 
will be very likely to do so in the future. The presence of a few 
lice on such varieties need cause no fear, for the idea of ever 
entirely exterminating such an insect from the country must w 
perfectly utopian, and all we can do is to watch and more partic- 
ularly care for those varieties that most easily succumb. In the 
future, the vineyardist will be enabled, by the revelations here 
made, to trace to a definite cause many a failure which has hitherto 
been wrapped in conjecture and mystery. : 
In thus calling the attention of the grape growing community 
to this interesting little insect, which is sapping the roots of their 
vines, my intention is to do good and not cause unnecessary 
consternation. Let me hope that others may be induced to study 
the microscopic plague and thus not only assist to fill the gaps 
yet occurring in its natural history, but help us to become aan! 
masters of it. Only those who have witnessed , 
it has made abroad, where in three years it caused a ope 
25,000,000 francs in the single department of Vaucluse, Frances 
can fully appreciate its importance and its power, 
circumstances, to do harm. 
I must remind those who live outside of 
observations in this country have been confine , 
of this State and apply more especially to this portion 
Missouri, that my 
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