SILK-WORMS. 
277 
6th. By never having the litter liable to fer- 
mentation longer on the wickers than I have pre- 
scribed. 
7th. By being careful never to distribute leaves 
that have not been thoroughly dried. 
8th. By using the fumigating apparatus when 
needful, the vapour of which destroys the most 
noxious animal emanations. (Chap. VII.) 
These things will be sufficient to prevent the 
occurrence of any of these diseases*. 
f * The author, convinced by experience that silk-worms 
never can be attacked by disorders when reared upon the prin- 
ciples he described, has doubtless omitted entering- into any 
symptomatic details of the diseases. He has mentioned the 
causes which produce them, and the physical and chemical phe- 
nomena that result from them, but has hardly delineated the 
particular character which distinguishes them from each other, 
and the symptoms by which they maybe recognized, an object 
which appears to me the most interesting to the cultivator : 
it might be conjectured, by the silence of the author upon some 
diseases observed among silk-worms in France, that they 
must have been totally unknown to him. 
Besides, the names given to the diseases known in Lom- 
bardy, are almost all in an inverse sense to those given in 
L'Abbe Rozier's cour d’Agricuture, in which the article 
on silk-worms is an excellent compendium of all that has been 
written on silk-worms by French authors, for which reason I 
have extracted the description of the diseases of silk-worms, 
which I fouud in that work. 
Of the Scarlet. 
This disease is so called, from the more or less dark red co- 
lour which the skin of the silk-worm assumes when issuing, 
or just after they have issued, from the egg. The worms at- 
tacked by this disorder, seem cramped, stupified, and sulfo- 
cated, their rings dry up, and they look exactly like mummies, 
