This opinion is, undoubtedly, very ingenious : and,
if it is just, serves to resolve not only the phenomenon
now under consideration, but likewise that which we



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2l8 THE PHILOSOPHY OF REUX LCh. VL

shall next consider — our seeing objects single with two
eyes.
It is evident that, in this solution, it is supposed that
we do not originally, and previous to acquired habits,
see things either erect or inverted, of one figure or
another, single or double ; but learn, from experience,
to judge of their tangible position, figure, and number,
by certain visible signs.
