1. The (very small mote of) dust which may be discerned in a sun-beam passing through a lattice is called trasarenu (trembling dust).
2. Eight of these (trasarenus) are equal to a nit.
3. Three of the latter are equal to a black mustard-seed.
4. Three of these last are equal to a white mustard-seed.
5. Six of these are equal to a barley-corn.
6. Three of these equal a Krishnala.