They were located in New England because "<span>The merchants had more money to invest and access to rivers and streams for power".
The manufactory industry was at its growth and people stated the perceive more money, those who were capable of investing decided to do it in this industry as the changes and improvements were noticeable.
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Slaves mainly but gold and salt good be included as well
One of the benefits of the new suburban lifestyle of the 1950s was that people had far more property, and therefore had more space. In cities, it would have been impossible to have the types of yards and garages seen in suburbia.