shows three typical successive reactions, the second being the smal- 
lest one. In every instance the resistance diminished notably. Imme- 
diately following this may be seen the increase of the E.M.F. of 
Fig. 3. 
polarisation. The slight falling off in the polarisation immediately 
before, is only clearly visible in the second reflex. 
The set of curves in fig. 3 demonstrates the initial fall of the 
polarisation followed by an increase. The short inflection of the 
curve immediately before its highest point is not equally well visible 
in the curves of figs. 1 and 2. The resistance curve agrees in every 
respect with the former ones. 
The first change after the application of the stimulus is visible 
in the polarisation curve and may be taken to be caused by a 
slight secretion-current of the skin. This secretion as well as a 
dilation of the bloodvessels in the skin account for the diminished 
resistance. Both tend to increase the current through the body. 
This last is attended and followed by an increased polarisation — 
most likely of both the internal and the episomatic polarisation. 
The vasomotor innervation pulse dying away, the vessels contract 
again, the skin loses its moistness either by evaporation or by 
resorption thus causing the current to fall off again. This is accom- 
panied by a diminished polarisation and closes the cycle. 
