russian Douma; but it would hardly profit us to insist on holding to Perry as the cause of the Douma: the terms have grown too remote to have any real or practical relation to each other. In every series of real terms, not only do the terms themselves and their associates and environments change, but we change, and their _meaning_ for us changes, so that new kinds of sameness and types of causation continually come into view and appeal to our interest. Our earlier lines, having grown irrelevant, are then dropped. The old terms can no longer be substituted nor the relations 'transferred,' because of so many new dimensions into which experience has opened. Instead of a straight line, it now follows a zigzag; and to keep it straight, one must do violence to its spontaneous development. Not that one might not possibly, by careful seeking (tho I doubt it), _find_ some line in nature along which terms literally the same, or causes causal in the same way, might be serially strung without limit, if one's interest lay in such finding. Within such lines our axioms might hold, causes might cause their effect's effects, etc.; but such lines themselves would, if found, only be partial members of a vast natural network, within the other lines of which you could not say, in any sense that a wise man or a sane man would ever think of, in any sense that would not be concretely _silly_, that the principle of skipt intermediaries still held good. In the _practical_ world, the world whose significances we follow, sames of the same are certainly not sames of one another; and things constantly cause other things without being held responsible for everything of which those other things are causes.