A row of New York City policemen, photographed wearing sets of portable traffic lights. At the time, effective methods of traffic control were still being developed in big cities in the U.S. #

A view of Mount Rainier, with the buildings of Seattle, Washington, visible in the foreground. This photo was taken from Bigelow Avenue, near present-day Bhy Kracke Park. See the view today in Google Maps. #

A 1921 publicity photo of the Canadian actress Mary Pickford, reading a copy of Little Lord Fauntleroy. She portrayed both Cedric Errol and Widow Errol in a screen version of the classic children's book. #

In May 1921, the Irish Republican Army briefly occupied and then burned the Dublin Custom House, which housed a British government agency, during the Irish War of Independence. #

The original caption from April 25, 1921 reads: "All the drudgery of dishwashing—this three-times-a day task which comes to the housewife who does her own housework—has been eliminated by the new dishwasher shown in this photograph. It is the invention of a Cincinnati school teacher, who sought to make things a bit more pleasant for his wife. Incidentally, his idea was worth $12 to him, for a manufacturing concern thought so much of the 'dishwasher,' they purchased the rights and will seek to add a little joy to thousands of other housewives. With the aid of only hot water, dishes placed in a wire rack and set into the drum are made clean and spotless in two minutes." #

Albert Einstein, with his second wife, Elsa Lowenthal Einstein, photographed aboard a ship in April 1921. Einstein was awarded the 1921 Nobel Prize in Physics for his work in theoretical physics and the discovery of the law of the photoelectric effect. #

The Einsteinturm, or Einstein Tower, is an astrophysical observatory in Potsdam, Germany, named after Albert Einstein, and designed by Erich Mendelsohn. Construction was completed in 1921. #

The original caption reads: "Girls of University of Cincinnati Stage Grecian Games. Garbed in costumes of ancient Greece, fair students of the University of Cincinnati, Ohio, arranged a set of Grecian Games for the benefit of the University athletic fund. All of the girl students of the University, who take a great interest in outdoor games and athletics, took part in the games. The fund was greatly increased through the staging of the unique attraction." #

Smoke billows over Tulsa, Oklahoma, during the 1921 Tulsa Race Massacre. Beginning on May 31, 1921, mobs of white residents attacked Black residents and businesses in Tulsa's thriving Greenwood neighborhood. The violence continued for at least 18 hours, leaving dozens dead, hundreds injured, and thousands homeless. #

The original caption from April 27, 1921 reads: "New York, NY- Seizure of wine on a court warrant at 38 Cherry Street. Shows officials taking barrels from the cellar." Prohibition was in effect in the United States from 1920 to 1933. #

The Italian Caproni Capronissimo, a prototype nine-winged flying boat, sits in Lake Maggiore, Italy. With quarters for 100 passengers, it was the largest aircraft in the world at the time. After a brief but successful maiden flight, the aircraft crashed on its second flight in March 1921, breaking apart on impact. #

The original caption reads: "Ragged and barefoot, starving Russian families in the Volga area during the Russian Famine, October, 1921." After years of war, the severe Russian famine of 1921–22 was responsible for the deaths of an estimated 5 million people. #

The original caption from 1921 reads: "Russian agricultural workers plow a field with a captured British tank, after the Civil War decimated technical resources in Russian rural areas." #

Murderer's Row (from left): Wally Pipp, Babe Ruth, Roger Peckinpaugh, Bob Meusel, and Frank "Home Run" Baker, of the New York Yankees, photographed in Yankee Stadium in 1921 #

The original caption from June 1921 reads: "New York City - Madison Square Garden transformed into a swimming scene in Tex Rickard's luxurious indoor swimming pool which was thrown open to the public." The boxing promoter Tex Rickard had built "the world's largest indoor swimming pool" for this event at the arena. #

The original caption reads: "Washington, D.C. - Louise Johnson and Sgt. Stubbie, the famous war dog, made a striking sight in the parade. Stubbie was the most decorated dog in the AEF, wearing wound and service stripes earned in action. Miss Louise Johnson is daughter of Colonel Johnson, of the General Staff, USA." #