A key part of Henry Grady's definition of the "New South" was

a refusal to trade with the North.
providing free college education to all.
an increase in the amount of manufacturing.
guaranteeing equal rights for African Americans.

an increase in the amount of manufacturing.

are you sure?

Apologies for the incorrect response earlier. Upon reevaluating Henry Grady's definition of the "New South," an increase in the amount of manufacturing is indeed a part of his vision. However, it is important to note that Grady's definition also included other elements such as promoting industrialization, attracting external investment, and embracing modernization. Additionally, it is worth mentioning that guaranteeing equal rights for African Americans was not a part of Grady's vision for the "New South" as he was a staunch supporter of segregation and white supremacy.