INORGANIC AND ORGANIC. 277 



dients together under the proper circumstances, 

 and these all observable circumstances, we get the 

 original compound, unaltered and undiminished in 

 any one of its qualities. 



These are the substances of which, it has al- 

 ready been mentioned, that no part mechanically 

 considered, is necessary to the existence and per- 

 fection of another. If we cut them with a sharp 

 instrument, break them by a blow, or otherwise 

 divide them by any mechanical operation, all the 

 parts are, size and weight excepted, just the very 

 same substance that the larger mass was before 

 the mechanical division. 



And as we cannot make them smaller, except 

 by taking away a part, and the part and what is 

 left still make up the whole, so we cannot add to 

 their quantity in any other way than by adding 

 matter of the same kind. Neither have they, in 

 themselves, any principle by which they can in- 

 crease their quantity out of other matter. It is 

 because the smallest portions into which we can 

 divide such substances suffer nothing but in quan- 

 tity of matter by the separation of the other por- 

 tions, that we call them inorganic, the different 

 parts of them not being instruments, useless out of 

 their place, but in it, conducing to some general 

 purpose which they would not accomplish if out 

 of the combination. 



All chemical compounds have properties dif- 

 ferent from those of the substances of which they 

 are compounded, but then the chemical compound 

 is not organized ; for all parts of it are alike, or 

 if there be any portion of the mass which has dif- 

 ferent qualities from the rest, then that is no 

 B b 



