258 ANALYSIS OF A NEW SPECIES OF LEAD-ORE. 



such conclusion could be drawn. It had all the 

 characters of a natural production. At the same 

 time, it would be worth while to make a few^ ex- 

 periments, in order to determine whether a si- 

 milar substance could be obtained by melting to? 

 gether sulphurets of lead and copper in the re- 

 quisite proportions. 



