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We are unacquainted with what occurs 
in the nervous fyftem under thefe circum- 
ftances, and confequently cannot fhew why 
fometimes one affedfcion fhould exift, and 
at others a different one. 
The number of thefe affedlions is very 
confiderable, and their charadter is various, 
and often extraordinary. 
Thofe amongft them which ftrike me 
particularly, and arreft my attention at this 
moment are, the catalepfy and fomnam- 
bulifm. 
In catalepfy, the perfbn who is attacked 
with it, retains the fame pofition he was 
in the moment before the paroxyfm. 
He remains as immmoveable as a ftatue, 
his eyes almoft always open. His joints are 
flexible, and give way to the application 
®f a foreign power, ifo that if one raife up 
the arm of a cataleptic, it remains in this 
new pofition, and the fame thing takes 
place with regard to the other limbs. The 
