Nine out of 10 workers on the transcontinental railroad were Chinese. These indentured laborers, derogatorily called "coolies," became a prime target for criticism in the mid-19th century. Joseph Becker/Library of Congress hide caption
Code Switch: Word Watch
A photograph of a group of elderly men sitting on a mat, taken in Peshawar, now in Pakistan, circa 1865. Two of the men are looking at each other with contempt, suggesting that they may actually be enemies who have been persuaded to be photographed together as examples of native "thugs." Getty Images hide caption
Anton Refregier's Beating the Chinese is a panel in the History of San Francisco mural at the city's Rincon Center. Chinese immigrants were frequent targets of hoodlums in the late 19th century. Carol M. Highsmith/Library of Congress hide caption
This editorial cartoon from a January 1879 edition of Harper's Weekly pokes fun at the use of literacy tests for blacks as voting qualifications. Wikimedia Commons hide caption
The arrival of Commodore Matthew C. Perry's "black ships" in Tokyo Bay in 1853 helped persuade the Japanese to negotiate a treaty. Perry had more firepower than all the coastal artillery defending Tokyo Bay. AP hide caption
The "boondocks" or "boonies" refers to places that are in the middle of nowhere. But few people know that the phrase was made mainstream by a fatal military training accident. iStockphoto.com hide caption
It's estimated that 4,743 Americans were lynched between 1882 and 1968. A large majority of those victims were black. Library of Congress hide caption
So where did the phrase "call a spade a spade" come from? andrewasmith/via Flickr hide caption
The shape of Asian eyes has been compared to almonds by Westerners for centuries. iStockphoto.com hide caption
Explorers Lewis and Clark were offended by a trade-gone-wrong and wrote in their journals that the group of Indians they interacted with were "forward and impertinent, and thievish." Wikimedia Commons hide caption
Made from the oil of the Chinese water snake, which is rich in the omega-3 acids that help reduce inflammation, snake oil in its original form was effective, especially when used to treat arthritis and bursitis. Jagrap/Flickr hide caption
In 2007, the NAACP held a mock burial for the N-word to symbolize its campaign to stamp out the word's usage. But it's proved to be a hardy foe. Carlos Osorio/AP hide caption
A man walks past anti-U.S. graffiti that reads "Gringos out" in Spanish. Howard Yanes/AP hide caption
One of the many, many forms of cannabis. "it was 3 a.m."/via Flickr hide caption