Date: 1678, 2nd edition in 1743
"For though the Geometrician perceive himself to make Lines, Triangles and Circles in the Dust, with his Finger, yet he is not aware, how he makes all those same Figures, first upon the Corporeal Spirits of his Brain, from whence notwithstanding, as from a Glass, they are reflected to him, Fancy ...
preview | full record— Cudworth, Ralph (1617-1688)