A. MS. notebook
MISCELLANEOUS NOTEBOOKS (MS 1584-1613)
The only dated entry is December 24, 1903. There are notes on: the fourcolor problem; three kinds of reasoning; Schiller's Riddle of the Sphinx; Steinthal on the Stoa; rules for existential graphs; pragmatism and abduction. Inserted sheets torn out of another notebook of the same kind contain notes on the Skew Mercator and on Sylvester.
Abduction and pragmatism (see also Hypothesis; Retroduction), Graphs existential, fourcolor problem (Map), skew mercator (Map), Pragmatism and Pragmaticism and abduction, Reasoning (probable see also Probability), Schiller F. C. S., Steinthal Heymann on the Stoa, Sylvester James j.