IONS IN IT TO SUIT THE SITE 174

PROPORTIONS OF THE PRINCIPAL ROOMS 176

THE PROPER EXPOSURES OF THE DIFFERENT ROOMS 180

HOW THE ROOMS SHOULD BE SUITED TO THE STATION OF THE
OWNER 181

THE FARMHOUSE 183

THE GREEK HOUSE 185

ON FOUNDATIONS AND SUBSTRUCTURES 189

BOOK VII

INTRODUCTION 195

FLOORS 202

THE SLAKING OF LIME FOR STUCCO 204

VAULTINGS AND STUCCO WORK 205

ON STUCCO WORK IN DAMP PLACES, AND ON THE DECORATION OF
DINING ROOMS 208

THE DECADENCE OF FRESCO PAINTING 210

MARBLE FOR USE IN STUCCO 213

NATURAL COLOURS 214

CINNABAR AND QUICKSILVER 215

CINNABAR (_continued_) 216

ARTIFICIAL COLOURS. BLACK 217

BLUE. BURNT OCHRE 218

WHITE LEAD, VERDIGRIS, AND ARTIFICIAL SANDARACH 219

PURPLE 219

SUBSTITUTES FOR PURPLE, YELLOW OCHRE, MALACHITE GREEN, AND
INDIGO 220

BOOK VIII

INTRODUCTION 225

HOW TO FIND WATER 227

RAINWATER 229

VARIOUS PROPERTIES OF DIFFERENT WATERS 232

TESTS OF GOOD WATER 242

LEVELLING AND LEVELLING INSTRUMENTS 242

AQUEDUCTS, WELLS, AND CISTERNS 244

BOOK IX

INTRODUCTION 251

THE ZODIAC AND THE PLANETS