CASSAVA. 71 



the poison, or other offensive ingredients, boiled 

 out of them. 



CASSAVA (jATROPHA MANIHOT.) 



If in these cases, any quality which the sub- 

 stance had previously shall disappear, we may 

 always conclude that that depends on the combina- 

 tion ; but if we find it in any substance that has 

 been separated by the process, it is either an 

 original quality of that substance, or it depends 

 on a combination which has not yet been dis- 

 covered: but which we may find upon further ex- 

 amination. 



It is thus probable that there is no permanent 

 quality of any thing material ; but that all dis- 

 tinctions which are apparent to our senses are the 



