Dialogue

 1 Intro| equal parts of the extremes, e.g. 1, 4/3, 2; the other kind
 2 Intro|    that the lower principle, e.g. mechanics, is always seen
 3 Intro|   always seen in the higher, e.g. in the phenomena of life,
 4 Intro|     one dialogue by another; e.g. the Timaeus by the Parmenides
 5 Intro|     of any two such numbers (e.g. 2 squared, 3 squared = 4,
 6 Intro|    single mean proportional (e.g. 4 and 9 have the single
 7 Intro| whereas the cubes of primes (e.g. 3 cubed and 5 cubed) have
 8 Intro|      two mean proportionals (e.g. 27:45:75:125). But to this
 9 Intro|    body he knew very little,—e.g. of the uses of the nerves
10 Timae| exceeded by an equal number (e.g.~— over 1, 4/3, 3/2, — over
11 Timae|     the ratio of 256 to 243 (e.g.~243:256::81/64:4/3::243/