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by experience, and where our instinctive reasoning power begins to lose its self-confidence; as when we question what we ought to think about psychical research, about the gospels, about difficult questions of political economy, about the constitution of matter; or when we inquire by what methods we can most speedily advance our knowledge of what matters.

But, as I said before, were direct applications of logic, such as these, never useful, instead of being frequently so, as they are, yet its indirect utility, through the useful conceptions with which it supplies us, would be immense.

Meantime, its highest and greatest values of all is that it affords us an understanding of the processes of reasoning. That the Platos are thoroughly right in that estimate will be more and more impressed upon our convictions as our acquaintance with the science grows.