[sTANSFiELD & harrison] THE REDUCTION OF IRON ORES 179 



between the gas and ore was not perfect, however, and in future 

 experiments this will be improved, perhaps by mechanical agitation. 

 Tests will also be made with "producer gas" instead of carbon 

 monoxide, as the latter could not be used commercially. A series of 

 tests are contemplated that will give comparative results for a number 

 of typical ores. 



In earlier experiments in this laboratory by Mr. George Kendall, 

 the rate of reduction of iron ores by charcoal and other solid forms of 

 carbon was studied. The present research into the reduction of 

 these ores by gases should make it possible to compare, quantitatively, 

 the reduction by solid carbon and by gases, and will form a basis of 

 experimental fact on which it should be possible to work out a com- 

 mercial method for the reduction of iron ores to a metallic powder. 



Department of Metallurgy, 



McGill University. 

 May, 1922. 



