METHODS OF TEACHING POLITICAL ECONOMY. 



37 



The slow and painful work of months is in this way presented to a 

 class in a few minutes, and the practical lessons caught at a glance. 

 Indeed, in most problems the difficulty is to put others in possession of 



the facts which one is about to discuss. For this purpose, charts are 

 the labor-saving machine of statistics. They can be made on com- 

 mon white cotton cloth (called sarcenet), which receives ink (black or 

 red or blue) or water-colors ; or on heavy manila paper, made large 



