Oxides of Carbon and Iron, 27 1 



Experiment XVIII. 

 Charcoal prepared from Birch, 



Composed of oxide of carbon 89*681 

 Ashes - 10-309 



100 parts. 



15 grains of this charcoal and 200 grains of oxide of 

 iron yielded by fusion a metallic button of cast iron that 

 weighed 62 grains (equal to 31 per cent, from oxide). 



90 grains of birch-wood, being found equivalent to the 

 above 15 grains of charcoal, were mixed, in the state of rasp- 

 ings, with 200 grains of oxide of iron. The result on fusion 

 was a button of iron 



Weighing (equal to 33 per cent.) 66 grains. 

 Revived by means of the charcoal 62 



Increase (equal to 2 per cent.) 4 



Experiment XIX. 

 Charcoal prepared from Sycamore, 



Composed of oxide of carbon 94*593 

 Ashes - - 5*407 



100 parts , 



15 grains of this charcoal being mixed with 200 grains of 

 oxide of iron and fused, a metallic result was obtained that 

 weighed 50 grains (equal to 25 per cent, from oxide of 

 iron) . 



79 grains of sycamore raspings (equal to 15 grains of char- 

 coal) and 200 grains of oxide of iron yielded by fusion a me- 

 tallic button that weighed (equal to31ipercent,)63 grains. 

 Revived by means of the charcoal 50 



Increase (equal to 6\ per cent.) 13 



Experiment XX. 

 Charcoal prepared from Lime-tree, 



Composed of oxide of carbon 96*321 

 Ashes , - 3-679 



100 parts. 

 S3 15 grains 



