Paragraph

1 2|     that which is seen should appear to be simultaneously two
2 3|     determinate bodies, which appear to possess a fixed colour
3 3| product could, at all events, appear neither white nor black;
4 3|      that the Black and White appear the one through the medium
5 3|      compound colour seen may appear to be one, owing to its
6 3|    some one colour should not appear to present itself as a blend
7 7|      simultaneously, but only appear to do so, their real successiveness