1. What quantity of screenings were purchased by the Department of Agriculture during each of the respective years from 1917 to 1921, inclusive?
2. From what firms were these screenings purchased and how much from each, during each of the said years?
3. What was .the purchase price, and what was the sale price of the said screenings during each of the above mentioned years?
4. What was the total profit or loss to the country on the purchase and sale of such screenings?
Subtopic: PURCHASE OF SCREENINGS