On March 13, 1895, Emil Junghans (He spelled his last name with a "Y" rather than a "J" - Yunghans) applied for a United States passport.
When you have a name but do not have confirmation that you have found an ancestor, these are the type of documents that help fill in the blanks.
This document confirms the date and place of birth and also provides the name of the ship and date of immigration to the United States.
Emil was born August 13, 1855 in Culten, Saxony, Germany. He left Bremen, Germany on the Weser, January 1871 and lived in Vincennes, Indiana. He became a United States citizen March 10, 1890.
The description at the bottom indicates he was only 5'7" and 39 years old at the time he applied for the passport.