Iron with Manganese. 357 



theadditionofoxideofmangane.se to the amount of 1 -5th the 

 weight ot the iron ore, alters the -rain and fracture of cast- 

 n-on, where a sufficient quantity of charcoal is present to e/lect 

 a perfect reduction of it, though it doe.s not appear to add to, or 

 impair to any observable amount, the quantitv of metallic pro- 

 duce. • ' 



No. 9. Argillaceous iron ore . . . . . . 500 '^rs. 



Oxide of manganese . . . . . . lo{) '^ 



Charcoal as in the former experiments 125 

 1 he result of this fusion was a crystallized radiated button 

 vve.ghmg 24/ grains, 49^., percent. Glass li^ht bluei.h green,with 

 considerable transparency. As part of it had escaped, the ex- 

 periment was repeated, and an elegant prismatic crystallized 

 metallic button again obtained, weighing 247 grain;, which 

 prwed beyond any doubt the accuracy of the result. 



No. 10. Argillaceous iron ore . . , . 500 grs. 



Oxide of manganese . . .. .. 150 



Charcoal ^th . . . . " V^S 



. ^f "1^ f""""^ ^'^'^ ^"^'on a crystallized button of metal weigh- 

 ing 240 grams, 48 per cent. Glass light-coloured flintv brown, 

 with a good deal of transparency. Ten grains of metallic carburet 

 were found unreduced ; some globules of metal put on a smooth 

 shining surface resembling iron highly charged with carbon. 

 Ao. U. Argillaceous iron ore .. .. 500 grs. 



Manganese roasted . . . . . . 250 



Charcoal jth, or . . . . " 125 



Result— A crystallized button and some carburett'ed globules 

 weighing 2.3 grains, equal to 50^ per cent. It was in this 

 experiment, for the hrst time, noticed that some of the globules 

 were not attracted by the magnet, and this peculiarity was attri- 

 buted to a high alloy of metallic manganese with iron: the glass 

 was ot a lead-gray colour, transparent in thin fragments : nine 

 grams ot magnetic carburet of iron were found unreduced. 



Ao. 1-. Argillaceous iron ore. . .. .. 500 grs. 



Manganese roasted . . . . . . 300 



Charcoal . . , . ^ ^ j25 



The metallic button resulting from'this fusion was* accurately 

 erys talhzcd, and attracted by the magnet; there were, howevei, 

 nearly twenty globules with smooth carburetted surfaces that 



ZV\fofi^''^^' "^'"^"^^ ''-^ ''^^ '»««"'^^- '^he whole produce 



weighed 260 grams, equal to 52 per cent. The glass was flinty 

 clouded but possessed a good deal of watery transparency, 



rvo. IJ. Argillaceous iron ore ., .. 500 grs. 



Manganese roasted . . . , \\ 400 



Charcoal ,. ,, ^^ i! 125 



^ 3 Although 



