SILK-WORMS. 
279 
the litter. The acrid humour, issuing from it, will kill any 
of the worms that touch it, which seems foreseen by the suf- 
fering animal, for they avoid the .approach of all the worms, 
and seek the edges of the wicker, as if to die alone. They are 
equally avoided by the healthy worms, \yho seek to retire from 
the pestilence. 
The moment any worms appear attacked by this dis- 
order, it is to be feared it may communicate to the whole 
brood ; they must, therefore, be carefully examined, and 
when there is the least shadow of doubt, remove those sus- 
pected of the disorder into the infirmary, where change of 
air alone may cure them if they arc not too far gone. As 
to those that positively are attacked by this disease, there is 
no expedient but throwing them away, and burying them in 
the dunghill, that the poultry may not pick them up, and be 
poisoned by them. 
Of the JFhite, or Tripe Sickness. 
M. Rigaud de Lisle, inhabitant of Crest, is, I believe, the 
first who distinguished this disorder. The worm, being dead, 
preserves its fresh and healthy appearance ; it must be 
touched, before its death can be ascertained, and it feels like 
tripe. 
Harpions, or Passes. 
These vulgar denominations have passed from the south- 
ern to the northern provinces traditionally, when the cultiva- 
tion of silk-worms was first beguu. Harpions is derived 
from claws, and passes from suffering. 
This disease is not really different from the scarlet, it is 
only a modification of the same ; it appears in the earliest 
stage, a few days after the hatching of the worm, when they 
assume a yellow colour ; that of the passes is darker yellow 
We must refer to what we have described of the symptoms 
of the scarlet. As to the two disorders of harpions and pas- 
ses, they are occasioned by the same causes which engender 
the scarlet. The diseased worms are known, 1st, from their 
yellow tinge ; 2nd, their lengthened spare shape, and wrinkled 
