7. "Of the impediments of knowledge; being the third chapter, the
preface only of it."

8. "Of the impediments which have been in the times and in diversion
of wits; being the fourth chapter."

9. "Of the impediments of knowledge for want of a true succession of
wits, and that hitherto the length of one man's life hath been the
greatest measure of knowledge; being the fifth chapter."

10. "That the pretended succession of wits hath been evil placed,
forasmuch as after variety of sects and opinions the most popular and
not the truest prevaileth and weareth out the rest; being the sixth
chapter."

11. "Of the impediments of knowledge in handling it by parts, and in
slipping off particular sciences from the root and stock of universal
knowledge; being the seventh chapter."

12. "That the end and scope of knowledge hath been generally mistaken,
and that men were never well advised what it was they sought" (part
of a chapter not numbered).

13. "An abridgment of divers chapters of the first book;" namely, the
l2th, 13th, and 14th, (over which is a running title "Of active
knowledge;") and (without any running title) the 15th, 16th, 17th,
18th], 19th, 21st, 22nd, 25th, and 26th. These abridgments have no
headings; and at the end is written, "The end of the Abridgment of
the first book of the Interpretation of Nature."