SILK-WORMS. 
249 
ture, the cultivators must be accountable for it 
alone, as they seldom apply the certainty of exact 
calculation to the innovations they adopt. 
As to the hedges of low mulberry-trees formed 
in indifferent and unproductive soils if cultivated 
with intelligence, they are of real benefit. 
I must repeat here, that which I said and pub- 
lished in Dalmatia nine years ago: — 
“ You will have a quantity of leaves if you plant 
“ mulberry-trees at given distances, as inclosures 
“ on each side the high roads, in the hollows; 
“ if you plant hedges of mulberry trees every- 
“ where, not injuring your other fields or produc- 
“ tions, you will have a still greater abundance of 
“ leaves. And obtaining this large quantity of 
“ leaves, there will soon be a larger quantity of 
“ cocoons.” 
I may have enlarged too much on this subject, 
and I must conclude, that before the culture of 
the wild mulberry-tree supersede the grafted 
tree, experiments must be made for many years, 
from wdiich alone exact calculations and unerring 
practical comparisons can be deduced. 
This appears to me so important an object, that 
I shall not suspend the experiments I make every 
year to attain exact information! upon it*. 
* The author most obligingly allowed me to visit the large 
establishment at Varese for his laboratory of silk-worms, 
where he has also planted a number of mulberry-trees. 
From 
M 5 
