Of all the works written by Pliny, one only, the ‘Historia Naturalis’ has survived to our times. This work, however, is not a ‘Natural History’ in the modern acceptation of the term, but rather a vast Encyclopædia of ancient knowledge and belief upon almost every known subject—“not less varied than Nature herself,” as his nephew says. It comprises, within the compass of thirty-seven books, 20,000 matters of importance, collected from about 2000 volumes (nearly all of which have now perished), the works, as Pliny himself states, of 100 writers of authority; together with a vast number of additional matters unknown to those authorities, and many of them the results of his own experience and observation. Hardouin has drawn up a catalogue of the authors quoted by Pliny; they amount in number to between 400 and 500. The following is a brief sketch of the plan of this wonderful monument of human industry. After a dedicatory Epistle to Titus, followed by a table of contents of the other Books, which together form the First Book, the author proceeds to give an account of the prevailing notions as to the universe, the earth, the sun, the moon, the stars, and the more remarkable properties of the elements (_partes naturæ_). He then passes on to a geographical description of the face of the earth as known to the ancients. After the Geography comes what may in strict propriety be termed “Natural History,” including a history of man, replete indeed with marvels, but interesting in the highest degree. Having mentioned at considerable length the land, animals, fishes, birds, and insects, he passes on to Botany, which in its various aspects occupies the larger portion of the work. At the same time, in accordance with his comprehensive plan, this part includes a vast amount of information on numerous subjects, the culture of the cereals and the manufacture of oil, wine, paper (_papyrus_), and numerous other articles of daily use. After treating at considerable length of Medical Botany, he proceeds to speak of medicaments derived from the human body, from which he branches off into discussions on the history of medicine, and magic, which last he looks upon as an offshoot from the medical art; and he takes this opportunity of touching upon many of the then current superstitions and notions on astrology. He concludes this portion of his work with an account of the medicinal properties of various waters, and of those of fishes and other aquatic animals. He then presents us with a treatise on Mineralogy, in which he has accumulated every possible kind of information relative to the use of gold, silver, bronze, and other metals; a subject which not unnaturally leads him into repeated digressions relative to money, jewels, plate, statues, and statuaries. Mineral pigments next occupy his attention, with many interesting notices of the great painters of Greece; from which he passes on to the various kinds of stone and