1840 united states censusの例文

• According to the 1840 United States Census, one out of every four families in Virginia owned slaves.
• He helped conduct the 1840 United States Census within the Wisconsin Territory, and was clerk of court in Portage County in 1842.
• The 1840 United States Census claimed that Northern, free blacks suffered mental illness at higher rates than did their Southern, enslaved counterparts.