From the British and Tasmanian Iron Company. 47 



During solution the acid at first readily attacks the iron, 

 the liquid assuming a green tint, afterwards passing into a 

 deep brown. 



After treating the finely-divided iron two or three times 

 with fresh portions of acetic acid, the liquid becomes nearly 

 colourless, holding very little iron in solution, and not any 

 chromium ; on further boiling with acetic acid chromium 

 was taken into solution. 



When all action had ceased there were obtained 37 grains 

 of insoluble pig iron, of which 2*20 grains were non-magnetic, 

 metallic particles, the remaining 34-8 grains being magnetic. 



Upon analysis the non-magnetic portion gave in 100 

 parts : — 



Percentage of iron ... ... ... ... 85*39 



„ chromium ... ... ... 14*90 



„ carbon ... ... ... trace 



100-29 



On treating these particles with nitric acid they are con- 

 verted into those silvery white plates. They correspond 

 exactly to the non-magnetic particles mentioned under the 

 heading of '^ Treatment with the Magnet." 



Upon treating a portion of the magnetic particles in 

 boiling hydrochloric acid, a few bronze-like stars were 

 obtained, corresponding to those mentioned under the 

 " Hydrochloric acid treatment ;" treating a portion also in 

 boiling nitric acid for a short time the silvery white plates 

 are obtained. These, upon analysis, gave in one hundred 

 parts : — 



Percentage of iron ... ... ... ... 84*60 



chromium ... ... ... 15*40 



100*00 



Treatment with the Magnet. 



The pig iron was ground to a very fine powder. One 

 hundred grains were then placed upon a glazed sheet of 

 paper and the magnet held in close proximity to the mass, 

 when the magnet became covered with metallic particles. 

 These were shaken on to a sheet of paper, thus separating 

 the magnetic from the non-magnetic. The magnetic particles 

 were then ground to a finer state of division, and re-treated 

 with the magnet several times. 



