726 
SUMMARY. 
1. The above experimental results lend support to the theory of 
Barany of the origin of cold-water nystagmus. The theory of BARTELS, 
on the other hand, conflicts with these results. 
2. In the genesis of cold-water nystagmus the cooling down of 
the horizontal semi-circular canal plays the principal part; however, 
in the majority of cases some influence (though little) is also to 
be assigned to the vertical semicircular canals. 
9. Harlier inquiries by Magnus and pr Kiryn have demonstrated 
a distinct cooling of the labyrinth-walls in cats, on douching the 
meatus with cold water. 
4. Compensatory eye-positions should be taken into account when 
cold-water nystagmus with various positions of the head in space is 
observed. 
