88 



BRIDGMAN. 



There are a few values for comparison. For the transition point, 

 Schwarz ^ found by an optical method that the II-III transition was 

 between 43.1° and 46.6° and the I-II point at 71.1°. The value found 

 above for the II-III transition was 42.7°, by extrapolation. I have 

 adopted the value of Schwarz for the I-II point, because of the irregu- 

 larity of my points. The transition line was drawn as the best straight 



TABLE VII. 



Carbon Trichloride [C>Clf,]. 



line from Schwarz's point to the high pressure points. If, however, 

 it had not been for Schwarz's value, and if only the lowest points of 

 the I-II curve had been used, as most probably unaffected by impuri- 

 ties, the I-II line would have shown distinct concavity toward the 

 pressure axis, and the extrapolated transition point at atmospheric 

 pressure would have been about 69°. Tammann ^ has determined 

 the effect of pressure on the transition up to about 2000 kgm. He does 

 not mention finding decomposition, but his highest temperature was 



8 W. Schwarz, Diss. Gott. (1892); Beibl. 17, 629-639 (1893). 



