C. S. Peirce Manuscripts

πλ 3 experimentation as putting questions to "nature," experiments upon diagrams are questions not to the nature of the relations concerned." Maybe, the general would suggest that there is a good deal of difference between experiments like the chemists, which are trials made upon the very substance whose behavior is in question, and experiments made upon diagrams, which has no real connexion with the things the diagrams represent. The proper response to that and the only proper one making a point that a novice in logic would be pretty sure to miss, would be "You are entirely right in saying that the chemist experiments upon the very object under investigation, although, after the experiment is done, the particular sample operated upon may be thrown away, as having no further