SILK-WORMS. 
343 
land, for instance, the administration of finance 
will return the duties on foreign produce, when 
this produce is to be exported after being worked 
or manufactured. It is upon this simple principle 
of political economy, and other circumstances, 
favourable to the industry of that nation, that it is 
enabled to strike at the industry of other coun- 
tries, which, not enjoying the same advantages, 
cannot compete with it in foreign markets. 
1 . Annual Value of the Cocoons , or of the Silk 
obtained from them, and exported. 
Some Observations on the Value of the Manufac- 
tured Silk which may be exported. 
I here offer a sketch of the value of silks and 
other produce of the cocoon, which have been ex- 
ported in the latter years of the kingdom of Italy, 
which has just ceased to exist. I shall add a note 
of the other articles more or less manufactured 
from the cocoon, and the silk exported. 
The exact quantity exported may be known by 
the Custom-House registers, where may be found 
the amount of duty paid. 
As to the value of the articles, it is determined, 
by the declaration of merchants and manufacturers, 
from current prices. 
There may therefore be differences, at least 
in the specified valuation, but in nothing else ; and 
