l»l»] Hall-Goodspeed : Chrysil 225 



It seems clear from the above figures that there is little to be feared 

 in the way of loss of rubber by the storage for some months of the 

 ground material of such rubber bearing plants as those whicli we 

 have investigated. It is assumed that a similar statement can be made 

 for plants in their original condition when stored in the laboratory 

 or mill under more or less uniform conditions of temperature and 

 moisture. 



Attention miglit be called to the fact that in table 5 it appears 

 that the content of acetone-soluble substances in general shows a some- 

 what greater diminution in amount following storage than does the 

 rubber content. Further experiments along this general line are 

 planned since evidence may, seemingly, be obtained regarding the 

 relation between resins as well as other acetone soluble substances 

 and rubber. Indeed other analyses of stored material, not so well 

 controlled and therefore not included in table 5, indicate that accom- 

 panying the loss of resins, etc., there is an actual increase in rubber 

 after storage. 



It had been our original intention to include in the various tables 

 which follow the date of analysis as well as the date of collection. 

 Since the period elapsing between these two dates seems to have little 

 or no influence upon the rubber content of a plant the former date 

 was eliminated. It should be said, however, that every effort was 

 made to analyze the various plants as soon as possible after they were 

 brought into the laboratory. In the majority of cases less than a 

 month or six weeks intervened between collection and analysis. 



