Complex sentence: And that each prime number represented a new set of evenly divided frequencies not yet represented by the previous in the series: i.e. a Major chord consist of prime ratio frequencies (overtones) 2,3,5, while a Major seventh chord consists of prime ratio frequencies 2,3,5,7.
Split into simpler sentences: And that each prime number represented a new set of evenly divided frequencies not yet represented by the previous. I.E. a Major chord consist of prime ratio frequencies (overtones) 2,3,5; while a Major seventh chord consists of prime ratio frequencies 2,3,5,7.