The Positive Sciences of the Ancient Hindus c4.s2.54

c4.s2.54

But the *Trasarenu* of physics is a different conception. It stands for the *minimum visibile*, *i.e.*, as the physicists define it, that which is *just discernible* as a glancing particle in the slanting beams of the morning (or afternoon) sun coming into a dark room through a chink or orifice of a window. This is a measure of size (or rather *stimulus limen*).