20. Pre-civil war technologies for food distribution (canals and carts)
a. What were the technologies for the distribution of food prior to the civil war?
b. What tonnage (annually) was used/moved by each of these technologies?
c. How did they change over time?
21. Rail and barge freight and how this changed the geography of food production and consumption
a. What are the technologies used for food distribution during this period of time?
b. What tonnage (annually) was used/moved by each of these technologies?
c. How did they change over time?
