The U. S. Census Bureau's homepage for population, housing, economic, and geographic data. it includes Industry Quick Reports, Geography Quick Reports, and Thematic Maps.
"The Making of Modern Law: Legal Treatises 1800-1926" provides digital images on every page of 22,000 legal treatises on US and British law published from 1800 through 1926. Full-text searching on more than 10 million pages provides researchers access to critical legal history in ways not previously possible.