1.2 



5,6 



7,8 



9,10 



FiG. 4. - 1, 2, 5 normali - 3, 4, 5, ^ ossigeno - 6, 7, 8, e?* ossigeno 

 rameico - 23, ^ acido cloridrico - 24, Q acido acetico. 



9, 10, (^ potassa - 11, 12, cf potassa - 13, 14, Q sci 



