A detailed, spectrographic analysis of two lectures, given by Diego Rivera and Margaret Mead, which were chosen for their realistic naturalness, permits a graphic presentation and description of the patterns of three types of intonation within the declarative sentence in Spanish and American English. They include a minor continuation (A), major continuation (B) and sentence-final intonation (C), comprising two contrasts A/B--minor continuation/major continuation, and AB/C--continuation finality. Sample texts taken from the lectures with approximated intonational patterns demonstrate the basic similarities of Spanish and American English speech. (Author/RL)