Chemistry is called rasayana-sastra. By chemical interaction of sulphur and mercury, if you can add tin and copper, then it becomes gold. You can manufacture gold, provided you know the process, how to mix up copper, tin and mercury. With via media of sulphuric acid. Sulphuric acid is the mother of chemicals. Without sulphur, you cannot make any chemical composition. Therefore all chemical composition is called sulphate, sulphite, like that. So our Vedic teachers are giving this idea of chemical composition. It appears that they knew how to work with chemicals. Now here is a hint of chemistry. But it is very difficult to mix mercury. As soon as there is little heat, immediately the mercury’s finished. So there is a process. Everything has process. Actually, chemically, copper, tin and mercury, if you mix proportionately, it will be gold. So this is an hint from the below example.
As the copper and tin, these two metals, mixed with mercury, there can be production of gold, similarly, by proper initiation and training, by a bonafied teacher, a person even though unqualified can become a first class intelligent person.
Ref >> Srila Prabhupada Vani
Jagannath Puri Hare Krishna Movement 