- 51 - 



Table 2. Effect of long and short extraction periods on the amount of acetone 

 and benzene extracts obtained from idant material - Continued 



Plant 



Lab. 



No. 



Acetone extract, 

 % dry wt. 



6 hrs. 



20 hrs. 



Benzene extract, 

 % dry wt. 



3 hrs. 



Asclepias syrlaca L. 



Asclepias tuberosa L. 

 Campanula betonicaefolia Sibth. & Sb. 

 Campanula carpatica Jacq. 

 Campanula latifolia L. 



Campanixla rapunculoides L. 

 Campanula traehelium L. 



Chrysothamnus nauseosus (Pall.) Britt. 

 var. speeiosus (Nutt.) Hall. 



728 



816 



U99 



1508 



902 



911 



915 



1478 



1490 



40 



566 



763 



961 



504 



506 



730 



113 



128 



58 



124 



121 



118 



120 



138 



11.0 

 10.0 

 15.5 

 12.8 

 16.1 

 13.7 

 U.5 

 14.4 

 11.7 

 14.9 

 15.4 

 11.9 

 12.5 

 16.8 

 15.0 

 13.6 

 13.5 

 11.1 

 23.8 



9.5 



9.8 



10.8 



12.0 



3.6 



13.6 

 18.3 

 22.6 

 17.0 

 20.5 

 18.2 



17.5 

 21.5 

 17.6 

 20.8 

 17.6 

 16.1 

 21.8 

 21.0 

 17.8 

 15.6 

 15.8 

 12.1 

 27.8 

 10.0 

 10.7 

 11.8 

 13.4 

 4.3 



0.91 



0.87 



0.96 



2.34 



1.30 



1.75 



2.10 



2.20 



1.90 



0.75 



1.81 



1.90 



1.06 



2.82 



1.48 



1.16 



0.66 



0.80 



0.58 



0.66 



0.75 



0.68 



0.76 



0.67 



