ANDREAS KURTZ 131 



American ore iooo\ Dry 63 



Old ore ... iooo> 25 of it = 22^= -bichrome 



Nitre ...... 500) 25 



American ... loooj Dry 90 

 Lime burnt... 220 > 17 =15 = -bichrome. 

 Saltpetre ... 500) 25 



American ore I oocn 



Lime ...... ioo 



American ore 1000) 63 



Salt ...... 500 > 1 700= 1500= - bichrome. 



Manganese.. 200) 25 



April 30, 1832, in our large way : 



Swedish ... 1000) 19= 16% at 30 ) 99 



Saltpetre ... 500 [ 



Chalk ...... 400) 5 : 30 :: i6X :99J 



"This is better than No. because there 

 is ioo Ib. more chalk with it, and works better 

 in our fournaices," and so on after many of 

 these mixtures there are remarks as to whether 

 they are good or bad, whether they work well, 

 give good results, or are too costly. 



We must conclude this notice of the manu- 

 facture of bi-chrome, by selecting two entries 

 on cost. Having given certain mixtures he 

 writes : 



4 Ib. ore cost 4d., 5 Ib. nitre 6d., id. labour and 

 fire -I id. 



