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the “Treatise,” confounds it with the intenseness of the feeling. They
certainly cannot be the same since, although memory is notoriously dimmer,
i.e. less vivid, than perception, we do not remember a gamboge
yellow as olive-color, nor a somewhat warmer yellow as brown. A slight
experimental investigation, which I made in 18.., afterward supplemented
in various ways, has led me to the following conclusions:

1. A slight psychological connexion only exists between
vividness with its opposite, faintness, and intenseness of feeling
with its opposite, dullness; in that when a genuinely warm
interest and attention had greatly increased the vividness of the
sensation of a particular object, according to the
direct introspective testimony of consciousness, measurement
showed a very slight increase of its intenseness, an increase