All drug stores sell the ready-to-use product, improved by the addition of other ingredients called Wyeth's Sage and Sulphur Compound. It is very popular because nobody can discover it has been applied. Simply moisten your comb or a soft brush with it and draw this through your hair, taking a small strand at a time; by morning the gray hair disappears, but what delights the ladies with Wyeth's Sage and Sulphur Compound is that, besides beautifully darkening the hair after a few applications, it also produces that soft lustre and appearance, abundance which is so attractive. 