ANDREAS KURTZ 127 



which he experimented on to produce 

 "Scheele's green": 



1. White oxide of arsenic ... 4 parts 

 Sulfat of copper ... ... 12 



Caustic potash ... ... 10 



Water 520 



2. Arsenic ... ... ... 4 



Sulfat of copper ... ... 12 



Carbonate of potash ... 10 



Water 520 



3. Arsenic 4 



Sulfat of copper ... ... 12 



Carbonate of soda ... ... 16 



Water 520 



4. Arsenic 4 



Crystallised verdigris ... 12 



Carbonate of potash ... 12 



Water 520 



5. Arsenic oxide ... ... 4 



Nitrate of copper 12 



Perlash 12 



Water 500 



In his Manchester business he was asso- 

 ciated with a Mr. Richard Niven of Belfast. 

 This partnership, as long as it lasted, was 

 most fortunate, and a very successful and 

 lucrative business was carried on. Kurtz 

 proved himself to be a most skilful, practical 

 chemist and competent manufacturer, whilst 



