DAVIS. 



THE LAW OF CORRESPONDING STATES. 



253 



Griessmann, practically eliminated the effect which Grindley had found. 

 His results are plotted as his Figure 4 which is reproduced as Figure 4 

 of this paper. He records 10 runs with 68 low side observations, 

 making 78 points in all. Two of the high side points and two of 

 the low side points still show traces of the wet steam effect and have 

 therefore been rejected. The other low side points are much more 



1" 

 600 



500' 



400 



300 







100 



200 



300 lbs. 



Figure 5. Dodge's throttling curves. Plotted from the original data 

 sheets. 



self-consistent than Griessmann's. The ten runs correspond to only 

 six throttling curves. The 74 satisfactory points were grouped into 

 33 means, giving the 27 values of the Joule-Thomson coefficient which 

 are presented in Table III and are plotted as circles with horizontal 

 crossbars in Figure 6. 



Dodge worked in the laboratories of the General Electric Company 

 at Schenectady, N. Y., from 1901 to 1906. His data were not given 

 at all in his first paper and were published only in part in his second 



