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necessity of every manufacturer possessing such a general 
education in all sciences and all arts, as to enable him to 
observe what the uneducated, and consequently prejudiced, 
man would allow to pass by him every day unnoticed ; but I 
will conclude, hoping, at some future time, to follow up the 
suggestions I have ventured to make, by a more detailed 
inquiry into the processes of illumination. 
