AW 31-3-71 



FIGURE 17. 



AVV 20 6 79 



AW 22-11-78 „„ „ ..„ AW ,,.,.,„ 4W n t |D 



Evolution of the ratio of saturated hydrocarbons 

 to aromatics. 



TABLE 2. Values of the R29-31 ratio. 



2 (C 29 + C 3 i) 

 Valeurs de R29-31 = 



C28 + 2C 3 o + C 



12 



129 



