reticulatum,51;Signinum,247f.Orchestra, reserved for senators,146;of Greek theatre,151.Order appropriate to temples,15;origin of different orders,102f.f.Organ, water,299f.Ὁργανον,283.Orientation of streets,24f.f.;of temples,116f.Orion (constellation),268.Ornaments of the orders,107f.f.Orpiment (ἁρσενικὁν),214.Ostrum, source of purple dye,220.Paconius,289.Paeonius of Ephesus,200.Palaestra,159f.f.Palla, stone quarries at,49.Panels of doors,118.Paphlagonia, intoxicating springs of,239.Παραδρομἱδες,188.Paraetonium,235;white,214.Parapet of theatre, dimensions of,148.Parmenio,273.Paros,289.Pastas,186.Patras, cellae of temple built of brick,53.Patrocles,273.Pausanias, son of Agesipolis,7.Peiraeus,234;naval arsenal at,198.Peisistratus,199.Pelecinum (sun dial),273.Penne,234.Pentaspast (hoisting machine),285.Pergamus,196.Peripteral temple,75f.Peristyle,186;decorations of,210f.;proportions of,179;Rhodian,186.Peritreti,303f.Perseus (constellation),266.Persian Porch,7.Persians, statues of,8f.Perspective, commentaries on by Agatharcus, Anaxagoras, and Democritus,198.Pesaro,63.Pharax of Ephesus,70.Phasis,231.Phidias,69.Philippus (physicist),269.Philip son of Amyntas,310.Philo,198,200;of Byzantium,199.Philolaus of Tarentum,12.Philosophy, why useful to architect,8.Phocaea,103.Phrygia,236.Phthia,102.Picenum,49.Picture galleries,179,186.Piles, of alder,61;olive, or oak,88.Πἱναξ of water organ,299.Pine,61.Pixodorus discovers marble near Ephesus,289;his name changed to Evangelus,290.Planets,257f.f.;their retrograde movement,260f.Plataea, battle of,7.Plato,195,251;rule for doubling the square,252.Πλειἁδες,189.Plinthium (sun dial),273.Πνευματικὁν,283.Po,231.Podium of theatre, height of,148.Pollis,199.Πὁλοι (pivots of heaven),257.Polus (star),267.Polycles of Ephesus,70.Polyclitus,11,69.Polyidus,199,310.Polyspast (hoisting machine),288.Pompeian pumice,47.Pompey, colonnades of,154;temple of Hercules,80.Pontic wax,216,217.Pontus,214,220,231,236.Poplar,60.Pormus,199.Posidonius,241.Pothereus (river),20.Pozzolana,46f.Praxiteles,199.Pressing room,183f.Priene,103;Temple of Minerva at,11,198.Primordial substance,42.Prison, location of,137.Proconnesus,289.Pronaos,114f.f.,120.Proportions,72,174f.;of circular temples,123f.;of colonnades,154f.;of columns and intercolumniations,78f.f.,116;of the Corinthian order,106f.;of doorways of temples,117f.f.;of Doric temples,109f.f.;of the Ionic order,90f.f.;of rooms,176f.f.Propriety,14f.f.Proscaenium of Greek theatre,151.Proserpine temple of Corinthian order,15;temple of,200.Προς παν κλιμα (sun dial),273.Προς τἁ ἱστοροὑμενα (sun dial),273.Prostas,186.Prostyle,75.Proteus, daughters of,239.Prothyra,188.Protropum (wine),236.Προτρυγητἡς (star),265.Pseudisodomum,52.Pseudodipteral temple,75,78,82.Pseudoperipteral temples,125.Pteroma,82,114,125.Ptolemy,196,197;Philadelphus,197.Public buildings, sites of,31f.Pump of Ctesibius,297f.Purple,213,219;substitutes for,220f.Puzzuoli,218.Pycnostyle temples,78f.;proportions of columns in,84.Pyrrus,199.Pythagoras,42,130,225,251,269;right triangle of,252f.Pytheos,11,109,198,199.Pythian games,251.Quarries of Grotta Rosa, Palla, Fidenae, Campania, Umbria, Picenum, Tivoli, Amiternum, Venetia, Tarquinii, Lake of Bolsena, Ferento,49,50.Quicksilver,215f.f.Quirinus, temple of,78.Quiver (sun dial),273.Rainwater,229f.f.Ram, battering,309f.;Hegetor's,314f.Ram (constellation),266.Raven (constellation),268.Raven, a machine of no value,310f.Ravenna,21,61,63.Reduction of columns,114.Refraction explained,175.Resin, soot of, used to make black,218.Resonant sites of theatres (ἁντηχουντες),153.Retaining walls,190f.Reticulatum opus,51.Retrogression of planets,261.Rhine,231.Rhodes,55f.,167,219,220;length of shadow of gnomon at,270;siege of,316f.Rhone,231.River (constellation),268.Rivers rise in the north,231.Rome,63,64,78,80,145,217;site of, determined by divine intelligence,174;length of shadow of gnomon at,270.Romulus, hut of,40.Roofs, of mud,39f.;timbers of,107;of Tuscan temples,122;of circular temples,124.Rooms, proportions of,176f.f.;proper exposure for,180f.;should be suited to station of the owner,181f.Round Building at Delphi,198.Salmacis, spring of,54.Salpia in Apulia,21.Sambuca illustrates effect of climate on voice,171.Samos,12,103,263,269,273;Doric temple of Juno in,198.Sand,44f.,48.Sandarach,214;made from white lead,219.Sardis,53.Sarnacus,199.Saturn (planet),260,261,262.Satyrus,199.Scaena of theatre,146;dimensions of,148;scheme of,150;decorations of,150;of theatre at Tralles,212.Scale, musical,141.Scaling machine,311.Scamilli impares,89,155,320.Scaphe (sun dial),273.Scopas,199.Scopinas,12,273.Scorpion (constellation),266.Scorpiones, rules for making,303f.f.Scotia,90,112.Scutula of ballistae,306f.Seats in theatre, dimensions of,148.Selinusian chalk (ἱσἁτις),220.Semiramis,235.Senate house, location of,137.Septentriones (She-Bears),267.Septimius, P.,199.Serapis, site of temple of,31.Serpent (constellation),266.Serpent-holder (constellation),266.Sesterce,74.She-Goat (constellation),266.Ship, motion of, explained,291.Shipyards,164.Sicily,236.Siege machines,309f.f.Signinum work,247f.Signs of the Zodiac,258;sun's course through,264f.;shown on dials,276f.Silanion,199.Silenus, on the proportions of Doric structures,198.Simae (ἑπαιετἱδες),96,108.Sinope,214.Smyrna,197,214;Stratoniceum at,154.Snake (constellation),268.Socrates,69,70,195.Soli,235.Soracte, stone quarries of,49.Sounding vessels in the theatre,143f.f.Southern Fish (constellation),267.Spain,214;cinnabar mines of,217.Sparta, paintings on brick walls at,53.Spica (star),265.Stables,184,186.Statonia,50.Steelyard, description of,291.Steps of temples odd in number,88.Stereobates,88.Stone,48,49f.Stratoniceum,154.Streets, directions of,24.Stucco,204f.f.;in damp places,208f.f.Stucco-workers, Greek,208.Stylobates,88.Substructures of houses,189f.f.Sulphur springs,233f.Sun,258f.;course of, through the twelve signs,264f.Sundials,273f.f.;how designed,270f.f.Sunium, temple of Pallas at,124.Susa, spring at,240.Syene,231.Symmetry,14;in temples and in the human body,72f.;modifications to suit site,174f.f.Syracuse,273.Syria,231,235,237.Systyle temples,78f.;proportions of columns in,84;Doric,113.Tablinum, proportions of,178.Tarentum,12,255;length of shadow of gnomon at,270.Tarquinii,50.Tarsus,234,240.Teano, acid springs of,238.Telamones,188.Teleas of Athens,70.Τἑλειον (perfect number),73f.Tempering of iron,18.Temples, classification of,75f.f.;circular,122f.f.;Corinthian,102f.;Doric,109f.f.;Ionic,90f.f.;Tuscan,120;foundations of,86f.f.;orientation of,116f.;proportion of columns of,78f.f.;sites of,31f.;Aesculapius,15,198;Apollo,31,78,80,200;Bacchus,15,31,82,109,198;Castor,124;Ceres,32,80,200;Diana,15,78,80,103,124,198,200,288f.;Equestrian Fortune,80;Faunus,75;Flora,15;Three Fortunes,75;Hercules,15,31,53,80;Isis,31;Juno,15,31,198;Jupiter,14,31,53,75,199;Honour and Valour,78,200;Mars,15,31;Mercury,31,54;Minerva,11,15,31,124,198;Nymphs,15;Proserpine,15,200;Quirinus,78;Serapis,31;Vejovis,124;Venus,15,31,54;Vulcan,31.Teos,103;temple of Bacchus at,82,198.Terracina,236,237.Testudinate cavaedium,177.Tetrachords,140f.f.Tetrastyle cavaedium,176.Thalamos,186.Thales,42,195,225,269.Thasos,289.Theatre,137f.f.;site of,137;foundations of,138f.;entrances to,138,148;plan of Roman,146f.f.;plan of Greek,151f.f.;sounding vessels in,143f.;acoustics of site of,153f.f.Thebes in Egypt,231.Themistocles, colonnade of,154.Theo of Magnesia,70.Theocydes,199.Theodorus,198.Theodorus the Phocian,