The _Parascenium_ or _Postscenium_ was the hinder part of the _Theater_, and the place whither the Actors retired and dressed themselves, and had their Rehearsals, and where the Machines were kept. Near the _Theaters_, were Publick Walks, in length a _Stadium_, which is about 90 _Perches_. There were Trees planted, and round about it were double _Porticos_, which were every one as broad as the Pillars on the out-side were high; for those within were higher by a fifth part, than those without, and they were likewise of a different _Order_; for those without were of the _Dorick Order_, and those within of the _Ionick_ or _Corinthian_. [Sidenote: _Lib. 5. Chap. 13._] The Ancients built their _Ports_ in two manners; at those which were _Natural_, they only made _Portico's_ round about with _Magazines_ and _Towers_ at the Ends, for to shut the _Port_ with a Chain. Those which were _Artificial_, were built three several ways: The first was to make Partitions of Wood only, without emptying the Water which was within the Partitions, and they cast into the Partitions, Stone and Mortar made with _Pozzolana_, thrown in hand over head; for they were certain that this Mortar wou'd grow dry in the bottom of the Water. The second Way was by making Partitions with ordinary Clay, or fat Earth at the bottom of the Sea, after the Water had been emptied out by Pumps. The third Way was to build a Mole upon the Sea-Coast, and to cast it in when the _Mason's_ Work was sufficiently dry, which only required two Months time. That they might the better throw these Moles into the Sea, they built them half upon the Sea-Coast, and half upon an heap of Sand which they made close to the Sea-Coast; to the end, that this Sand which was stopped by nothing but by the Walls, built only to support it during the time that the Mole was a drying, might let it fall when the Sea came to carry away the Sand after that the Walls were beaten down. [Sidenote: _Lib. 5. Chap. 10._] The _Bathes_ of the Ancients consisted of many Chambers; some for Men, and some for Women. Some of the Chambers had a moderate Heat, to warm their Bodies insensibly, and prepare them for a stronger Heat to make them Sweat. The Chamber they were to Sweat in, was called _Laconicum_, and was round, and Vaulted like the ends of an Oven, pierced at the top with a round Opening, which was opened and shut with a Buckler of Brass, which hung at a Chain, by which means they augmented or diminished the Heat according to the Proportion that they pull'd up, or let down the Buckler. One and the same Furnace heated both the Air and the Water, according to the Disposition of the places which were nearer or further from the Furnace, whose heat was communicated to the Chambers from under the Flooring, which was made full of little holes.