I call any geometrical figure, or group of points, chiral (Greek: Hand) and say it has chirality, if its image in a plane mirror, cannot be brought to coincide with itself (1873)

1. the absolute thermometric scale (1848)
2. that there is nothing new to be discovered in physics now (1900)
3. that the Earth is 20-40 million years old (1900), and ...
4. the idea of atoms as knots and links of swirling vortices in the aether (1867)