Magic can be preformed in two manners, Arcane and Miracles.
Alchemical devices are magical creations. Any sentient creature who touches one instantly realizes it is a thing of power. He learns the item’s power and how to wield it in an instant.
All he must do to actually use the spell it contains is follow any instructions, such as drink a beneficial potion, point a wand at a foe, or read a scroll (unless he is Illiterate).