جون أغسطس جاست (بالإنجليزية: John Augustus Just) هو كيميائي أمريكي، ولد في 9 يناير 1854، وتوفي في 13 سبتمبر 1908. (ar)
Dr. John Augustus Just (January 9, 1854 – September 13, 1908) was a German-born chemist and inventor. He is best known for his investigative work into recovery of precious metals from their ores and for completing the process for evaporating milk. For his scientific achievements, he was awarded a medal by the committee celebrating Berthelot's 50th anniversary. Just registered dozens of patents with the United States Patent Office. He also founded several companies in the Syracuse, New York area including the Just Mining and Extraction Company, the Just's Food Company, the Just Process Company and the Just Reduction Company. He belonged to numerous scientific societies, and his work in investigative chemistry gained him worldwide recognition. (en)