| 1899 | Born April 11th in Birmingham, Alabama, to James Sumner Julian and Elizabeth Adams Julian |
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| 1920 | Graduated Phi Beta Kappa and valedictorian from DePauw University |
| 1923 | Received his MA degree from Harvard University |
| 1927-32 | Served as Assistant Professor, Professor and Head of Chemistry Department, Howard University |
| 1931 | Received his PhD degree from the University of Vienna, Austria |
| 1932-36 | Served as Research Fellow in Organic Chemistry, DePauw University; began work on the synthesis of physostigime, a drug used in treatment of glaucoma |
| 1932-36 | Director of Undergraduate research in the DePauw University Chemistry Department |
| 1935 | Married Anna Johnson, December 24; children: Percy Lavon, Faith Roscelle |
| 1936-53 | Directed research and managed fine chemicals for the Glidden Company; developed synthetic cortisone, an inexpensive drug in the treatment of rheumatoid arthritis, as well as many other commercial and medicinal uses for soy-based products |
| 1947 | Received the Springarn Medal from the NAACP |
| 1950 | Received the Chicagoan of the Year award from the Chicago Sun-Times |
| 1954 | Founded Julian Laboratories in Oak Park, Illinois and Laboratorios Julian de Mexico in Mexico City, Mexico |
| 1961 | Sold Julian Laboratories to Smith, Kline and French for 2.3 million dollars |
| 1964 | Retired as President of Julian Laboratories, Inc. and Laboratorios Julian de Mexico |
| 1975 | Died April 19 in Waukegan, Illinois |