OF COBALT, &c. 



, however, always appears when cither iron 

 If, or iron mixed with any other metal U 

 edin an acid. 



m thcie particulars it appears, that there 

 a remarkable and fmgular fimillitude be- 

 > cobalt, nickel, manganefc, and iron; yet 

 .milarity is by no means fo great as to induce 

 hink all thcie only are one and the fame me- 

 or this can be demonftratcd no other way, 



