This site from the Arlington National Cemetery provides an easy to read account of the life and work of Dr. Walter Reed (1851-1902 CE), Major in the United States Army Medical Corps who proved that yellow fever was transmitted by...

This site from the Arlington National Cemetery provides an easy to read account of the life and work of Dr. Walter Reed (1851-1902 CE), Major in the United States Army Medical Corps who proved that yellow fever was transmitted by...

A map from 1899 of Mexico showing the general climate divisions of the region, including areas of warm climate, temperate climate, and cold climate. "The Tropic of Cancer crosses Mexico near the center. The low, hot, and moist coast...

General Mitchel, born at Morganfield, Union County, Ky., August 28th, 1809, died at Hilton Head, S. C., October 30th, 1862, was graduated from the United States Military Academy in 1829. Immediately after his graduation he was made...

George Edwin Waring was born in Poundridge, NY, July 4, 1833. He was agricultural engineer of Central Park, New York City in 1857. He was the drainage engineer of the park until the Civil War broke out, when he entered the Union army as...