56 



K. TSURUÏA. 



§ 32. In most of my experiments, the present as well as those 

 of the preceding- paper, I have taken care to be ;is free as possible from 

 the effect of magnetic disturbances on the galvanometer by working 

 at night when shocks from work going on in the laboratory and other 

 places in the neighbourhood had ceased. Since every arrangement in 

 the thermo-electric circuit remained the same, the assurance may be 

 had that, so far as relative magnitudes only are concerned, the results 

 described in the preceding paper must be right. 



§ 33. In the course of the present investigation, however, I 

 have been gradually made aware of the inconstancy of the thermo- 

 electric E. M. F\ When one series of measurements was compared 



