1140 
I have still more accurately examined the validity of this-method. 
When applying it, I determined with some cats a dermatome and 
afterwards 1 cut on either 
side the two adjoining hind- 
roots. When I examined then 
once more the region of the 
hyperreflexion on the skin, 
I found that it had not di- 
minished. 
Ricco and Maenini had in- 
deed already discovered that 
local application of this poison 
to the spinal cord produces 
phenomena that remain re- 
stricted to this region. 
The method for the deter- 
mination of more adjoining 
dermatomes with one animal, 
indicated by me, gives great 
advantages for further in- 
vestigation. Now, for instance, 
we need no more use for 
one extremity the dermatomes 
that have been found with 
different animals, in order to 
obtain an insight into the 
manner in which these der- 
matomes are divided over that 
extremity, but we can directly 
determine all dermatomes on 
one extremity with the same 
animal and in this way find 
and study the exact arrange- 
ment and mutual covering. 
During this study which I 
continued in the mean time, 
I succeeded in determining 
all the dermatomes of one 
hind-leg with several cats *). 
1) The result of these investigations which are still continued, will afterwards 
be communicated. 
