[Vol. 6 



102 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 



tracts when the sawdust was autoclaved with distilled water 

 for the time indicated : 



TABLE V 



TOTAL DRY WEIGHT OF THE SOLUBLE SUBSTANCES IN THE AQUEOUS EXTRACTS 



Flask no. 



Interval of 

 autoclaving 



Dry wt. of residue 



(gms.) 



Average 

 (gms.) 



45 

 46 

 47 



1 

 2 

 3 



4 



5 

 7 



8 



9 



10 



11 

 12 

 13 



Not autoclaved 

 45 minutes 



I hour, 45 minutes 



II hours 

 21 hours 



. 0045 

 . 0045 

 0.0047 



0.0078 

 0.0072 

 0.0077 



0.0076 

 . 0075 

 . 0075 



0.0114 

 0.0113 

 0.0112 



0.0149 

 0.0137 

 0.0143 



. 0046 

 0.0076 

 0.0075 

 0.0113 

 0.0143 



A considerable increase in the total soluble substances is 

 evident. This is no doubt due in part to the dissolving out 

 of initially soluble substances, but that it may also be partly 

 due to the conversion of some of the wood substances is indi- 



TABLE VI 



TOTAL DRY WEIGHT OF THE SOLUBLE SUBSTANCES IN THE ACID EXTRACTS 



Flask no. 



39 

 40 

 41 



Interval of autoclaving 

 with dist. H 2 



Not autoclaved 



Subsequent 

 autoclaving 

 after addi- 

 tion of acid 



1 hour 



Dry wt. of 

 residue 

 (gms.) 



0.0169 

 0.0173 

 0.0199 



Average 

 (gms.) 



0.0180 



14 

 15 

 16 



17 



19 



21 



22 



23 

 24 



45 minutes 

 11 hours 

 21 hours 



1 hour 

 1 hour 

 1 hour 



0.0073 

 . 0045 

 0.0079 



. 0088 

 . 0080 

 0.0075 



0.0177 

 0.0193 



. 0066 

 0.0081 

 0.0185 



4m ■ 





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