Editorial notes

1) For our dating of Ms-154 see the corresponding parts in Ms-113.

2) Between leaf 24 and leaf 25 one leaf seems to have been cut out.

3) We are indebted to Daphne Bielefeld for her guidance on reproducing Wittgenstein’s score.

4) The remark is preceded by geometric graphic drafts, including of angle trisection.

5) A first and a second attempt at graphic the elastic spring are deleted.

6) On page 91v.