You have chosen 'Presidential Address of Am. Math. Soc' by Oswald Veblen, 'Letters to De Vries' by Baruch de Spinoza and 'On the Algebra of Logic' by Charles Sanders Peirce
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Natural Theory, or select a subheading: |
| A. | Speculations on Nature | |
| B. | Natural Kinds | |
| C. | Causation | |
| D. | Laws of Nature |