Mercury

"Such as he is joined with,
quicksilver."

Those born under Mercury are mercurial (or chamaelion-like): they are hot with those who are hot, cold with cold, and so on.

He governeth in man's body the tongue, memory, cogitation, hands and thighs.

He hath dominion over the frenzy, madness, melancholy, falling sickness, cough, rheum and the abundance of distilling spittle, and generally all things are subject unto him; and he hath two mansions, Gemini and Virgo.

Children born under Mercury

If he be Lord of the nativity, he maketh the children stout, wise and apt to learn, modest, secret, and eloquent; of person small, lean, pale of visage, smooth haired, fair eyes, hard and bony handed. This planet giveth name to Wednesday.