6. The best and most sure way to prevent the Diseases and Pains in the Teeth and Gums, is every Morning to wash your Mouth with at the least ten or twelve Mouthfuls of pure Water, cold from the Spring or River, and so again after Dinner and Supper, swallowing down a Mouthful of Water after each Washing: For there is no sort of Liquor in the World so pure and clean as Water; and nothing doth cleanse and free the Teeth and Gums from that foul Matter which does proceed from the Breathings and Purgings of the Stomach, and from the various sorts of Food, so well as Water: The use of other Washes is to little or no purpose; but whosoever do constantly wash their Mouths with Water, as is before mentioned, shall find an essential Remedy. All hard Rubbing and Picking of the Teeth ought by any means to be avoided for that is injurious to them. Also whensoever you find your Mouth foul, or subject to be slimie, as sometimes it will more than at others, according to the good or evil state of the Stomach, though it be not after eating; at all such times you ought to wash your Mouth. This Rule all Mothers and Nurses ought to observe, washing the Mouths of their Children two or three times a day; and also to cause their Children to swallow down a little Water, which will be very refreshing to their Stomachs: For Milk does naturally foul and fur the Mouth and Teeth, and if they be not kept clean by continual washing, it causes the Breeding of Childrens Teeth to be the more painful to them. 7. To keep your Teeth white, one of the best things is a piece of a _China_ Dish, or a piece of a fine _Dutch_ Earthen Dish, made into fine Powder, and the Teeth rubbed with it. 8. Few there be that understand or consider the excellent Vertues of Water, it being an Element of a mild and cleansing Nature and Operation, friendly unto all things, and of universal Use: But because it is so common, and so easily procured, I am afraid that many People will be like _Naaman_ the _Syrian_, when the Prophet _Elisha_ advised him to _wash seven times in the River of Jordan to cure his Leprosie_; it being the Ignorance and Folly of most People, to admire those things they do not know, and, on the other side, to despise and trample under foot those Things and Mysteries they do know; which the Learned in all Ages have taken notice of: For, should some People know what Apothecaries and others give them, they would despise the Physick, and have but little respect for their Doctor.