Winters speculated that the two glass spheres and the glass tube connecting them should form a sealed whole, and the liquid inside the glass sphere was likely some kind of highly volatile substance.
As a spellcaster, Winters quickly figured out the principle behind this testing instrument. Simply put, this device could detect even the faintest magical ability.
The magical ability of an untrained spellcaster is as weak as the tiny sparks from a fire sickle, and this clever instrument could detect the presence of those sparks.
First, by balancing the scale to achieve equilibrium, if the subject possesses even the weakest fire-type spell ability, just enough to vaporize a little bit of the liquid in the glass sphere, the balance of the scale would be disturbed.
Even Winters couldn't help but applaud the ingenious design of this invention. It is known that the hardest part is not training a spellcaster but finding those with magical talent from among the masses.
