Born at B'yankfurt on the Main, February 2 d, i8og. 
DIED, 
IN THE MIDST OF HIS SCIENTIFIC LABORS 
AT HIS HOME IN ST. LOUIS, ON MONDAY, FEBRUARY 4th, 1884, 
IN THE SEVENTY-FIFTH YEAR OF HIS AGE. 
3QOJ Locust Street, St. Louis, 
March loth, 1884. 
