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77

— Economy of money, time, thought, and energy.

It is Prof. Ernst Mach who has done the
most to show the importance in logic
of the consideration of Economy, although
I had written a paper on the subject as early
as 1878. But Mach goes altogether too far.
For he allows thought no other value than that
of economizing experiences. This cannot for
an instant be admitted. Sensation, to my thinking, has no
value whatever except as a vehicle of thought.

But Proposals for hypotheses inundate us
in an overwhelming flood, while the process of verification
to which each one must be subjected before
it can count as at all an item even
of likely knowledge is so very costly