In this final stage of a series of three linguistic studies conducted at the University of California, Santa Barbara, four topics are presented. The longest is a study of consonant gemination in German, Spanish, French, and American English from acoustic, perceptual, and radiographic points of view. Pharyngeal features are studied in the consonants of the same four languages. Vowel radiography and its acoustic correlations are discussed, and a cross-language study is made of the j/i distinction. (AF)