274 On the djjinity existing between 



of iron. The metallic result from the fusion of this mixture 

 was 38 grains. 



55 grains of raspings (equal to 15 grains of the charcoal 

 and 200 of the oxide) gave 



A metallic button weighing 58*73 grains. 

 Revived with charcoal - 38* 



Increase (equal to 10*371 pet cent.) 20| 



Experiment XII. 

 Charcoal prepared from Chestnut, 



Composed of oxide of carbon 98*20 



Ashes - - 1*80 



100 parts. 



15 grains of this charcoal and 200 of oxide of iron pro- 

 duced by fusion a metallic button that weighed 40 grains, 

 (equal to 20 per cent.) from the oxide of iron. 



83 grains of chestnut wood were found, by a calculation of 

 the loss it sustained in charring, to be equal to 15 grains of 

 charcoal : that quantity, in the state of raspings, was mixed 

 with 200 grains of oxide of iron, and produced by fusion a 

 metallic button (equal to 29 percent, from the oxide) 



Weighing 58 grains. 



Revived as above with charcoal 40 



Increase (equal to 9 per cent.) 18 



Experiment XIII. 

 Charcoal prepared from Laburnum, 



Composed of oxide of carbon 95*20 

 Ashes - - 4*80 



100 parts. 



15 graius of this charcoal and 200 of oxide of iron yield- 

 ed a metallic button of iron weighing 41 grains (equal to 

 20 1 percent.). 



73 grains of laburnum (being found equal to 15 grains 

 of coal) and 200 grains of oxide of iron, mixed intimately 

 together, produced a metallic button (equal, to 251 per cent.) 



Weighing 



