526 



IOWA ACADEMY OF SCIENCE Vol. XXVI, 1919 



FIGURE 132 



increased temperature. In these respects it does not appear to have 

 the nature of metals. It is evident that the theory of conduction used 

 to explain the conduction of electricity in metals cannot be applied 

 to tellurium. The fact is also emphasized that no judgment may be 

 made on results obtained with tellurium unless a complete history of 

 the material and the method of procedure is at hand. 



Department of Physics, 

 State University of Iowa. 



