Pliny the Elder, tireless researcher and writer, is author of the encyclopedic "Natural History, " in 37 books, an unrivaled compendium of Roman knowledge. The contents of the books are as follows. Book 1: table of contents of the others and of authorities; 2: mathematical and metrological survey of the universe; 3-6: geography and ethnography of the known world; 7: anthropology and the physiology of man; 8-11: zoology; 12-19: botany, agriculture, and horticulture; 20-27: plant products as used in medicine; 28-32: medical zoology; 33-37: minerals (and medicine), the fine arts, and gemstones. The Loeb Classical Library edition of Natural History is in ten volumes.