EXPERIMENTAL STUDY OF HEAT LEAKAGE. 781 



Mean pm, all plugs, 4.02 kgm./cm^. 



TABLE IV. 



Characteristics of m' vs. - plots. 



n'o is the extrapolated value of the Joule-Thomson coefficient; fi2, the 

 apparent value at the highest flow; n'l, the apparent value at the lowest flow. 

 The quantities in the fifth column may be taken as representing the percentage 

 part of the extrapolated coefficient which the extrapolation is depended upon 

 to supply. 



