ng vessels in, 143 _f._;
acoustics of site of, 153 _ff._

Thebes in Egypt, 231.

Themistocles, colonnade of, 154.

Theo of Magnesia, 70.

Theocydes, 199.

Theodorus, 198.

Theodorus the Phocian, 198.

Theodosius, 273.

Theodotus, 214.

Theophrastus, 167, 241.

Thessaly, 237.

Thrace, 237.

[Greek: Thyroreion], 186.

Tiber, 231.

Tigris, 231.

Timaeus, 241.

Timavo, 231.

Timber, 58 _ff._

Timotheus, 54, 199.

Tivoli, 233; stone quarries of, 49.

Tortoise, 311 _ff._;
of battering ram, 310;
Hegetor's, 312 _ff._

Torus, 90.

Towers, construction of, 22 _f._;
dimensions of moveable, 310.

Tralles, 212;
palace of brick at, 53;
colonnades at, 154;
temple of Aesculapius at, 198.

Treasury, location of, 137.

Trichalca, 74.

Triglyphs, origin of, 107 _ff._;
arrangement of, 109 _f._, 113;
size of, 112.

Trispast (hoisting machine), 285.

[Greek: Trochilos] (scotia), 90.

Troezen, 54, 234.

Troy, 195, 211, 237.

Trypho, Alexandrine architect, 317 _f._

Tufa, its qualities, 49.

Tuscan, cavaedium, 176;
temples, 120 _f._

Twins (constellation), 266.

Tyana, 235.

Tympanum, 96, 122;
water tympanum, 293.

Tyre, 309.

Ulysses, 211.

Universe, definition of, 257.

Varro, M. Terentius, 199, 256.

Vaultings, 205 _ff._

Vejovis, temple of, 124.

Velian country, acid springs of, 238.

Venter ([Greek: koilia]), 245.

Venus, Corinthian order appropriate to, 15;
site of temple of, 31;
temple of, 54.

Venus (planet), 259.

Verdigris, 219.

Vergiliae, 189.

Vermilion, 213, 215;
preparation of, 216.

Vesta, altar of, 125.

Vestorius, 218.

Vesuvius, 46, 47.

Via Campana, 238.

Vinegar a solvent of rocks, 239.

Violets used for purple colour, 220.

Virgin (constellation), 265.

Vitruvius, education, 13, 168;
personal appearance, 36;
method of writing, 197 _ff._;
military service, 3;
his basilica at Fano, 134 _ff._

Voice, defined, 138 _f._;
pitch of, determined by climate, 171.

Volutes, 93.

Voussoirs, 190.

Vulcan, site of temple of, 31.

Walks, how to be constructed, 156;
serve practical purpose, 156.

Walls, material for, 24;
methods of building, 51 _ff._, 56;
of brick are durable, 53;
of rubble, 53.

Warden (constellation), 265.

Water (constellation), 268.

Water, 225 _ff._;
indispensable, 226;
how to find, 227 _ff._;
properties of, 232 _ff._;
tests of good, 242