COAL-CONVERSION GASIFIER CONDENSATE 217 



equation is valid only for meta and para substitution (Jaffe, 1953). 

 Partition coefficients per se may be of value for indicating relative 

 toxicities, however. We have found, for example, that, within certain 

 groups of related compounds, there is a direct correlation between 

 the partition coefficient and the toxicity of a compound, but 

 elaboration of this concept must await further investigations. 



ACKNOWLEDGMENTS 



We acknowledge the excellent technical assistance provided by 

 Patricia Miller and Carole Richter. We are also indebted to the 

 Pittsburgh Energy Research Center and especially P. M. Yavorsky for 

 the Synthane condensate samples used in this investigation. 



When this work was done, T. W. Schultz was a postdoctoral 

 investigator supported by subcontract No. 3322 from the Biology 

 Division, Oak Ridge National Laboratory, to the University of 

 Tennessee. 



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