50 CLASSIFICATION OF CHEMICAL AOENTS. 



of Oxigeii;'* I now transmit to you an application of the 

 priuciple there proposed to the classification of chemical 

 agents. I shall first present in order the arrangement, 

 which I bca^ leave to sutriiijest; and afterward, by way of elu- 

 cidation, will add a few apposite and necessary observa- 



tloDS. 



Classification, 



Classification Class I Attraction. 



cf d,emical ^^^^^ jj Repulsion. 



as producing a varied state of these. 

 1 Heaty 



atwdyofasci- Precise knowledge of the recondite phenomena of any 

 ?iice 10 begm g^jience c«Q only be attained by hiin, who has previously 



acquired 



