140 On the Affinity existing between 



15 grains of this charcoal with 200 grain? of oxide of 

 iron, gave by fusion a metallic button weighing 40 grains, 

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



bb'b grains of mahogany was found equal to 15 grains of 

 charcoal. This, in the state of small raspings, was mixed 

 with 200 grains of oxide of iron. The result, by fusion was 

 A metallic button weighing 43 grains. 



Revived as above with charcoal 40 



(i 



Increased, (equal to \\ per cent.) ;-» 



Experiment VII h 

 Charcoal prepared from Sallow, 



Composed of oxide of carbon 93'Sfii 

 Ashes - - (5-135 



100 parts, 



15 grains of this charcoal mixed with 200 grains of oxide 

 of" iron, gave by fusion a metallic button which was found 

 to weigh 43 grains, (equal to <2\\ ptr cent.) 



79 grains of sallow, being found equal to 15 grains of 

 charcoal, this, in the state of raspings, was mixed with 200 

 grains of oxide of iron. The compound was fused, and the 

 result was A button of iron weighing 6*0 grains. 

 Charcoal revived only - 43 



Increase, (equal to 8| percent.) 17 



Experiment IX. 

 Charcoal prepared from American Black Beech, 

 Composed of oxide of carbon 95* 1 69 



Ashes - - 4-831 



100 parts! 



15 grains of this charcoal mixed with 200 grains of oxide 

 of iron, yielded by fusion a metallic result weighing 36 

 grains, (equal to 18 per cent.) 



Gy grains of black beech were requisite to form 15 grains 

 of charcoal. These, in the state of raspings, were mixed with 



200 grains 



