Oxides of Carton and Iron* * 275 



Weighing 52 grains. 



Revived with charcoal - 41 



Increase (equal to b\ per cent.) 11 



Experiment XIV. 

 Charcoal prepared from Scotch Oak, 



Composed of oxide of carbort 98*133 



Ashes - - 1-865 



/ 100 parts i 



15 grains of this charcoal and 200 of oxide of iron were 

 intimately mixed, and fused together. A button of iron was 

 obtained that weighed (equal to 27 per cent.) 54 grains. 



65 grains of oak being requisite to form the above, 15 

 grains of this charcoal were mixed with 200 grains of oxide 

 of iron. The fusion of this mixture was productive of a 

 button of iron that was found to weigh (equal to 31| per 

 cent.) - 63 grains. 



Revived with 15 grains of charcoal 54 



Increase (equal to 4| per cent.) 9 



Experiment XV. 

 Charcoal prepared from the White Wood of the same Oak> 

 Composed of oxide of carbon 97*325 

 Ashe9 - - 2*675 



100 parts. 



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

 yielded a metallic button that weighed 49 grains (equal to 

 244 per cent.)* 



96 grains of white wood, found by calculation from ex- 

 periment to be equal to 15 grains of charcoal, were mixed 

 with 200 grains of oxide of iron, and the compound reduced 

 by fusion. The result was a metallic button that weighed 

 (equal to 341 per cent.) 69 grains. 



Revived with charcoal * 49 



Increase (equal to 10 per cent.) 20 



S 2 'Experiment 



