INTRODUCTION 281 MACHINES AND IMPLEMENTS 283 HOISTING MACHINES 285 THE ELEMENTS OF MOTION 290 ENGINES FOR RAISING WATER 293 WATER WHEELS AND WATER MILLS 294 THE WATER SCREW 295 THE PUMP OF CTESIBIUS 297 THE WATER ORGAN 299 THE HODOMETER 301 CATAPULTS OR SCORPIONES 303 BALLISTAE 305 THE STRINGING AND TUNING OF CATAPULTS 308 SIEGE MACHINES 309 THE TORTOISE 311 HEGETOR'S TORTOISE 312 MEASURES OF DEFENCE 315 NOTE ON SCAMILLI IMPARES 320 INDEX 321 LIST OF ILLUSTRATIONS CARYATIDES FROM TREASURY OF CNIDIANS, DELPHI 6 CARYATIDES OF ERECHTHEUM, ATHENS 6 CARYATID IN VILLA ALBANI, ROME 6 CARYATIDES 7 PERSIANS 9 CONSTRUCTION OF CITY WALLS 23 TOWER OF THE WINDS, ATHENS 26 DIAGRAM OF THE WINDS 29 DIAGRAM OF DIRECTIONS OF STREETS 30 VITRUVIUS' BRICK-BOND 44 TRAVERTINE QUARRIES, ROMAN CAMPAGNA 49 EXAMPLE OF OPUS INCERTUM, CIRCULAR TEMPLE, TIVOLI 51 OPUS RETICULATUM, THERMAE OF HADRIAN'S VILLA, TIVOLI 52 EXAMPLE OF OPUS RETICULATUM, DOORWAY OF STOA POECILE, HADRIAN'S VILLA 52 MAUSOLEUM AT HALICARNASSUS, RESTORED 54 CLASSIFICATION OF TEMPLES ACCORDING TO ARRANGEMENTS OF COLONNADES 76 HYPAETHRAL TEMPLE OF VITRUVIUS COMPARED WITH PARTHENON AND TEMPLE OF APOLLO NEAR MILETUS 77 CLASSIFICATION OF TEMPLES ACCORDING TO INTERCOLUMNIATION 79 EUSTYLE TEMPLE OF VITRUVIUS COMPARED WITH TEMPLE OF TEOS 81 VITRUVIUS' RULES FOR DIAMETER AND HEIGHT OF COLUMNS COMPARED WITH ACTUAL EXAMPLES 83 DIMINUTION OF COLUMNS IN RELATION TO DIMENSIONS OF HEIGHT 85 ENTASIS OF COLUMNS 87 FRA GIOCONDO'S IDEA OF "SCAMILLI IMPARES" 89 IONIC ORDER ACCORDING TO VITRUVIUS COMPARED WITH ORDER OF MAUSOLEUM AT HALICARNASSUS 91 COMPARISON OF IONIC ORDER ACCORDING TO VITRUVIUS WITH ACTUAL EXAMPLES AND WITH VIGNOLA'S ORDER 95 BASILICA AT POMPEII 104 CORINTHIAN CAPITAL OF VITRUVIUS COMPARED WITH MONUMENTS 105 VITRUVIUS' DORIC ORDER COMPARED WITH TEMPLE AT CORI AND THEATRE OF MARCELLUS 111 VITRUVIUS' TEMPLE PLAN COMPARED WITH ACTUAL EXAMPLES 115 VITRUVIUS' RULE FOR DOORWAYS COMPARED WITH TWO EXAMPLES 119 TUSCAN TEMPLE ACCORDING TO VITRUVIUS 121 CIRCULAR TEMPLE, TIVOLI 123 MAISON CARREE, NIMES 123 PLAN OF TEMPLE, TIVOLI 123 PLAN OF TEMPLE OF VESTA, ROME 123 PLAN OF CIRCULAR TEMPLE ACCORDING TO VITRUVIUS 124 FORUM, TIMGAD 131 FORUM, POMPEII 133 PLAN OF BASILICA, POMPEII 134 VITRUVIUS' BASILICA, FANO 135 ROMAN THEATRE ACCORDING TO VITRUVIUS 147 THEATRE AT ASPENDUS 149 THEATRE PORTICO ACCORDING TO VITRUVIUS 152 TEPIDARIUM OF STABIAN BATHS, POMPEII 157 APODYTERIUM FOR WOMEN, STABIAN BATHS, POMPEII 157 STABIAN BATHS, POMPEII 158 PALAESTRA, OLYMPIA, AND GREEK PALAESTRA ACCORDING TO VITRUVIUS 161 PLANS OF HOUSES, POMPEII 176 PLAN OF HOUSE OF SILVER WEDDING, POMPEII 177 PLAN OF TYPICAL ROMAN HOUSE 178 PERISTYLE OF HOUSE OF THE VETTII, POMPEII 179 PLAN OF HOUSE OF THE VETTII, POMPEII 179 PLAN OF VILLA RUSTICA, NEAR POMPEII 183 PLAN OF VITRUVIUS' GREEK HOUSE 186 PLAN OF GREEK HOUSE, DELOS 187 PLAN OF GREEK HOUSE DISCOVERED AT PERGAMUM 188 RETAINING WALLS 191 CONSTRUCTION OF THE ANALEMMA 271 CONSTRUCTION OF WATER SCREW 295 WATER SCREW 296 HEGETOR'S RAM AND TORTOISE 312 1.

From sixteenth century MS.
2.

From model by A.A.

Howard.
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