Da Vinci Notes #38 - Absolute & Relative Measurements
The pupil of the eye, in the open air, changes in size with every
degree of motion from the sun; and at every degree of its changes
one and the same object seen by it will appear of a different size;
although most frequently the relative scale of surrounding objects
does not allow us to detect these variations in any single object we
may look at.
Keith's Ideas:
1. When you change, positively or negatively, you might not
discover the effects as everything you perceive changes.
2. To be accurate, you must consider both the absolute and
relative measurements.
Keith To