Prefessor Agassiz once told the Harvard students of a farmer who owned a farm of hundreds of acres of unprofitable woods and rocks, and concluded to sell out and get into a more profitable business.

• 阿加西教授曾给哈佛大学的学生们讲过这样一个故事：一位农民决定卖掉一个数百英亩的农场转投更能赢利的事业。