17, 18. The type in the case of human stature, &c.
19, 20. The type in mental characteristics.
21, 22. Applications of the foregoing principles and results.
[CHAPTER III.]
ORIGIN OR PROCESS OF CAUSATION OF THE SERIES.
§ 1. The causes consist of (1) ‘objects,’
2, 3. Which may or may not be distinguishable into natural kinds,
4–6. And (2) ‘agencies.’
7. Requisites demanded in the above:
8, 9. Consequences of their absence.