The following teaser in from an excellent article posted October 28, 2015 at the fstoppers.com website.
From 1892 to 1925, Augustus Sherman, the chief registry clerk of Ellis Island, took photographs of immigrants as they arrived in the United States. The photographs are striking for their display of the vast array of cultural backgrounds that passed through on their way to becoming citizens of the U.S. Take a look at some of the history contained in this archive.
Originally published by National Geographic in 1907, this treasure trove eventually passed on to the headquarters of the Immigration Service in Manhattan, before arriving at its current home in the New York Public Library, which graciously made many of the prints available online.