Hi I have the book "Die Einwohner von Bischmisheim vor 1900" that has quite a few BARTHEL families listed. I found the following "Emil":
BARTHEL, Emil Johann bpt. 08 March 1899 in Bischmisheim, Germany. His parents were: Richard Jacob BARTHEL bpt. 04 Jan 1866 in Bischmisheim, and Catherina Margareta KLEIN bpt. 13 Nov 1867 in Bischmisheim. They were married 27 Oct 1888 in Bischmishiem. They had 8 children by 1901.
..if this is your family, let me know and I can send more information.