721 
position and at another position of the head in space, with a rotatory 
Rotation III (no correction). 
Fig. 4. 
movement of 45° with the upper cornea-pole towards the temporal, 
a nystagmus of 75° anteriorly upwards, the correction is 75°—45°=30°. 
The corrected direction, therefore, is that direction of the nystagmus 
that would be found, if the eyes were only under the influence of 
the labyrinth-stimulant consequent on the douching, and if there were 
no compensatory eye-posttions. 
Figs 2—4 illustrate our results before and after correction. 
RESULTS. 
As stated above, it had already been detected by BARANY, Hornr, 
and others that the direction of the nystagmus in man varies with 
different position of the head in space. This result was borne out 
by our experience. 
When examining a rabbit, first in ventral position and subsequently 
with its head hanging downwards, we found a difference of 180° 
in the direction of the nystagmus. 
