The adequate stimulus of the semicircular canals by a rotatory acceleration is producing a nystagmus, whose graph of the postrotatorius I is adequate to a decreasing e-function. The constants of the function are calculabe, the variance is very small. The inadequate stimulus of the semicircular canals by caloric stimulation effects a nystagmus, which shows an intensive changing course of the graph with a large variance. Only smoothings and standardisations by counting of an individual coefficient of the reaction-intensity lead to a graph, which is nearly adequate to an increasing and decreasing e-function. The variance of the single nystagmus-parameters grows with its range of reaction. The velocity of the slow phase shows the largest variance. Each experimental arrangement, which enlarges the nystagmus-intensity, is enlarging the variance coincident. The experimental conditions are neither to form by illumination of the eyes nor by increasing of the mental activity in such a uniform way that the variance would be reduced. The valuation of the singular nystagmus-parameters for the clinic is only to confirm by the examination of otoneurologic syndroms.