104 



BRIDGMAN. 



TABLE X. 



Relative Specific Resistances of Solid Mercury at 0° C. 



The ratio of the resistance of the liquid to that of the sohd at the freezing 

 point at 0° and 7640 kg. is 3.345. 



that the vakies for the sohd and the hqiiid are so close, and still more 

 surprising that the value for the solid is greater than that for the 

 liquid. The former rough work suggested the opposite and more 

 natural behavior. 



The ratio of the resistance of the solid to that of the liquid at the 

 freezing pressure may also be calculated from the measurements. 

 In view of the extreme care taken to compel the freezing to go slowly, 

 and the fact that when the apparatus was taken apart the capillary 

 was found cracked only at the bend, it is probable that the observed 

 ratio of resistance of solid to liquid refers to the relative resistances of 

 material occupying space .of the same dimensions in the liquid and 

 solid states, that is, to relative values of the specific resistance. The 

 value found for the ratio of resistance of liquid to solid at 0° and 

 7640 kg. (the equilibrium coordinates) was 3.345. This falls within 

 the range of the very irregular values found in the previous work. 



Gallium. The raAv material from which this rare metal was pre- 

 pared I owe to the kindness of Dr. K. Stock of the Bartlesville Zinc Co, 

 The purification I owe to the kindness of Professor T. W. Richards. 

 He was engaged in a redetermination of the atomic w^eight and certain 

 other physical properties, and w^as kind enough to include some of my 

 raw material with his, and let me have some of the purified product. 



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