The headings of the four folders and the list of contents made by Engels for the second and third folders of materials for Dialectics of Nature were written in his closing years, in any case not earlier than 1886, for the list of contents of the second folder includes the fragment “Omitted from Feuerbach,” which was written early in 1886.
[First Folder]
Dialectics and Natural Science
[Second Folder]
The Investigation of Nature and Dialectics
1) Notes:
a) On the Prototypes of the Mathematical Infinite in the Real World
b) On the “Mechanical” Conception of Nature
c) On Nägeli’s Incapacity to Know the Infinite 2) Old Preface to [Anti]-Dühring. On Dialectics 3) Natural Science and the Spirit World 4) The Part Played by Labour in the Transition from Ape to Man 5) Basic Forms of Motion 6) Omitted from Feuerbach
[Third Folder]
Dialectics of Nature
1) Basic Forms of Motion
2) Two Measures of Motion
3) Electricity and Magnetism
4) Natural Science and the Spirit World
5) Old Introduction
6) Tidal Friction
[Fourth Folder]
Mathematics and Natural Science
Miscellaneous