S.
Qu. Whether identity of person consists not in the Will?
No necessary connexion between great or little optique angles and great or little extension.
Distance is not perceived: optique angles are not perceived. How then is extension perceiv'd by sight?
Apparent magnitude of a line is not simply as the optique angle, but directly as the optique angle, & reciprocally as the confusion, &c. (i.e. the other sensations, or want of sensation, that attend near vision). Hence great mistakes in assigning the magnifying power of glasses. Vid. Moly[neux], p. 182.
Glasses or speculums may perhaps magnify or lessen without altering the optique angle, but to no purpose.
Qu. Whether purblind would think objects so much diminished by a convex speculum as another?
Qu. Wherein consists identity of person? Not in actual consciousness; for then I'm not the same person I was this day twelvemonth but while I think of wt I then [pg 073] did. Not in potential; for then all persons may be the same, for ought we know.