But if the master of this craft wants to create the eye called an elixir in order to attach it to whatever he wants of metallic bodies, then he turns it according to what is governed by the nature of that receptive body and the medicine is one, which is the elixir. Of the bodies there are those that the elixir returns to its ruling, so it is an elixir that does its work, and it is what is called the substitute, so it acts in the rest. Metal bodies and he rules with his ruling, such as taking the weight of a dirham or any weight he wants from a spring of elixir and throwing it on a thousand weights of any body you want. If it is tin or iron, he gives him the form of silver, and if it is copper, black lead, or silver, he gives him the form of gold, and if the body is sulfur, he gives him the form. His power and leaving him as a substitute for him rules over the bodies with his ruling, but with a weight that is different from the weight of the rest of the bodies, and that is the weig