ozonizing plant
1Percy Lavon Julian — Infobox Person name = Percy Lavon Julian image size = 250px caption = Julian circa 1940–1950 birth date = birth date|1899|4|11|mf=y birth place = Montgomery, Alabama death date = death date and age|1975|4|19|1899|4|11|mf=y death place = Waukegan …
