Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

  • Listen to MedLink on the go with Audio versions of each article.

Worker in a large zinc smelting operation

Zinc smelting operation at the Eagle-Picher plant near Cardin, Oklahoma. (Source: Photograph by Fritz Henle [1909-1993], January 1943. U.S. Office of War Information. Courtesy of the U.S. Library of Congress, Washington, D.C.)