The preparation and study of 7,7ʹ-dimethyl-8,8ʹ-diquinolyl, 6,6ʹ-dinitro-2,2ʹ, 4,4ʹ-tetramethyldiphenyl, 6,6ʹ-diamino-2,2ʹ,4,4ʹ-tetramethyldiphenyl, and 5,5ʹ,7,7ʹ-tetramethyl-8,8ʹ-diquinolyl

by Mary Grace Waring