The _Romans_ and the _Greeks_ ordered and distributed differently their _Apartments_; for the _Romans_ had their _Courts_ and _Entries_ magnificent: but the _Greeks_ had only a narrow Entrance, through which they passed into a _Peristyle_; this _Entry_ had of one Side a Porter's Lodge, on the other Side the Stables. The _Apartments_ of these two Nations differed in this, the _Apartments_ of the Women were separate from the _Apartments_ of the Men among the _Greeks_; insomuch that they Dined apart. They had likewise particular _Rooms_ reserved for Strangers apart, where they only gave them Lodging, and never treated them above one Day. CHAP. III. _Of things that equally appertain to Publick and Private Buildings._ ARTICLE I. _Of_ Aqueducts. [Sidenote: _Lib. 8. Chap. 6._] In Order to the bringing of Waters to Towns and Cities, the Level must be exactly taken; to the end, it may be known whether the Waters can be brought thither or no. The Ancients to this end made use of an Instrument called _Corobates_, which was directed by a Lead, and by Water, when the Wind hindered them from making use of the Lead. They brought their Water three several ways; _viz._ by _Aqueducts_, by Pipes of Lead, and Pipes baked in a _Potter's_ Furnace. They allowed for the _Channels_ or _Sewers_ of the _Aqueducts_, for every 100 Foot, half a Foot of Declination or Sloping; and if any Hills were in their way, they dug through them, making Vents to give Air at convenient Distances. The Pipes of Lead were at least 9 Foot long; they made them of bended Sheets or Plates, and of different thicknesses, according to the Proportion of the greatness of the Pipes; these Pipes had likewise their necessary Declination or Sloping, and if any Valley was in the way, they made it equal to the Level with a Wall; they likewise made many Vents, to give the Water Air, and to know where to mend the Pipes. The Pipes of _Potter's-Work_, were two Inches thick; they were joyned together with Mortar mixed with Oil, and when they had _Conde_ or _Joynt_ to make, they made use of a red Free Stone which they pierced through, to receive the two Ends of the Pipes. ART. II. _Of Wells and Cisterns._ It being remarkt oftentimes that the Water which is under the Earth hath many bad Qualities, and exhales vapours, which often stifles those which work in the _Wells_, after that they are dug, & the Water begins to gather together. The Ancients had this Precaution, to let a Lamp gently down into it, and if it extinguished it, they took it for an Infallible sign that the Water was bad.