On the eighth day, chemical analysis began. Adam, recovering after cooperating with God in creating Eve, felt the first pangs of hunger. Looking around, he spied a pile of stones left over after creation of some nearby mountains. He rejected a soft friable sandstone and chose a hard granite rock, took careful aim at a rabbit, and hit it squarely between the eyes. This was the basis for the first real meal in the Garden of Eden. A day or two later, Eue took a whiff of the rabbit carcass, thought for a moment, then fed it to the dog.

Thus, the first chemical analytical instruments were Adam's eye and hand and Eve's nose. These, plus taste, sufficed by themselves for a long time thereafter but, eventually, refinements were necessary.