The USGS was entrusted with the responsibility for mapping the country in 1879 and has been the primary civilian mapping agency of the United States ever since. The best known USGS maps are the 1:24,000-scale topographic maps, also known as 7.5-minute quadrangles.
Click on the date links to see some of the oldest South America maps in our collection: South America 16th century 1550. 17th century 1630 / 1662 / 1663 / 1675 / 1700. 18th century 1710 / 1736 / 1757 / 1760 / 1786 / 1794. 19th century 1876. Argentina 1672 / 1702-1707 / 1814; Brazil 1672 / 1814 Chile 1672 / 1814; Colombia 1672 Ecuador 1672 ...
Aug 15, 2018 · Rocky Mountain spotted fever was reported in 4,269 people in the U.S. in 2016, according to the Centers for Disease Control and Prevention. It can kill up to 10 percent of victims, depending on ...
Maps and Atlases in Our Collections Add or remove collections Home Maps and Atlases in Our Collections The Covarrubias America : A Decorative Map of the United States of America
The Rocky Mountain Spotted Fever Laboratory was established in a former school building in Hamilton, Mont., on September 20 as a recognized PHS field station. 1922. The Library of the Office of the Surgeon General (Army) was renamed the Army Medical Library in January.
Oct 28, 2015 · The Lone Star Tick May Be Spreading A New Disease : Shots - Health News An uptick in cases of Rocky Mountain spotted fever might actually be due to a newer tick-borne bacterium. It looks like it's ...
Yellow fever is an acute viral disease. The yellow fever virus is a Flavivirus with a 400-year history. The disease originated in Africa and then spread to South America in the 1600s. The first reports of yellow fever in the U.S. occurred in Charleston, SC and Philadelphia, PA in 1699.
The Santa Fe Trail was a significant historical and economical important commercial route from 1821 to 1880, extended from the westernmost settlements of the United States in Missouri across the plains Indian country to the New Mexican capital of Santa Fe. The date 1821, is generally accepted as the beginning of the Santa Fe Trail.
Our collection of old historical maps of North Carolina span over 200 years of growth. View North Carolina Maps such as historical county boundaries changes, old vintage maps, as well as road / highway maps for all 100 counties in North Carolina.
Aug 18, 2019 · Historic Map Works features over 1 million maps from around the world in its collections, with a focus on maps from North America. Several hundred thousand of the maps have been geo-referenced and can be viewed for free as historical map overlays in Google through their free Historic Earth Basic Overlay Viewer.