2f>() 



apparently in contradiction to each otlier; until at last with the 

 help of a thermo-element of a peculiar structure ue have come to 

 understand the phenomena which dominate the efïect. 



In tig. 1 this thermo-element is represented, as it is 

 hung within the gold beaker B. (The wall of the little 

 l)eaker must be thought transparent). B is attached by 

 two pins /S' to the screw-stopper of the little oven; D 

 are two wires twisted together, brass and constantane, 

 which are soldered by their ends to a thin plate of 

 silver-plate Z (5 X 7 mm., 0,02 mm. thick), which is 





liilplüilii 



^^-"■ïr"™ immersed for somewhat more than half in the p-azoxy- 

 Fig. 1. auisol. 



With the help of this thermo-element we have indeed been able 

 to slate the thermic etfect, but learned to distinguish between the 

 effect of a transversal field (with the lines of foi-ce perpendicular 

 to the silver-plate) and of a longitudinal (ield (with the force-lines 

 // the silver-plate). 



Fig- 2 



Fig. 2 may make this clear; a curve, taken by photography, 

 is represented. At A a transveisal field is connected with the 

 result that the temperature of the silver-plate rises slowly ; 

 15 sec. later at B the field is broken up and a still slower 

 cooling of the plate is the result; 15 sec. later, at C (before the 

 temperature has as yet regained the original value) the transversal 

 field is put on for the second time; 15 sec. later at D it is again 

 broken up; and at last 15 sec. later a longitudinal field is put on 

 at jË" and this causes a quicker reaching of the thermostat temperature- 

 A new connection of the longitudinal field remains without effect^). 



The principal conclusion from our experiments is this, that the 

 effect observed must have its origin in the immediate vicinity of 



1) It need hardly be mentioned, that in the isotropic phase the connection and 

 disconnection of the magnetic field offers a thermic effect. 



