From the Magi to Pliny’s magic—Habits of animals—Remedies discovered by animals—Jealousy of animals—Occult virtues of animals—The virtues of herbs—Plucking herbs—Agricultural magic—Virtue of stones—Other minerals and metals—Virtues of human parts—Virtues of human saliva—The human operator—Absence of medical compounds—Sympathetic magic—Antipathies between animals—Love and hatred between inanimate objects—Sympathy between animate and inanimate objects—Like cures like—The principle of association—Magic transfer of disease—Amulets—Position or direction—The time element—Observance of number—Relation between operator and patient—Incantations—Attitude towards love-charms and birth control—Pliny and astrology—Celestial portents—The stars and the world of nature—Astrological medicine—Conclusion: magic unity of Pliny’s superstitions.

Salve, parens rerum omnium Natura, teque nobis Quiritium solis celebratam esse numeris omnibus tuis fave!

Closing words of the Natural History.[119]

I. Its Place in the History of Science

Important in our investigation.

We should have to search long before finding a better starting-point for the consideration of the union of magic with the science of the Roman Empire, and of the way in which that union influenced the middle ages, than Pliny’s Natural History.[120] The foregoing sentence, with which years ago I opened a chapter on the Natural History of Pliny the Elder in my briefer preliminary study of magic in the intellectual history of the Roman Empire, seems as true as ever; and although I there considered his confusion of magic and science at some length, I do not see how I can make the present work well-rounded and complete without including in it a yet more detailed analysis of the contents of Pliny’s book.

As a collection of miscellaneous information.

Pliny’s Natural History, which appeared about 77 A.D. and is dedicated to the Emperor Titus, is perhaps the most important single source extant for the history of ancient civilization. Its thirty-seven books, written in a very compact style, constitute a vast collection of the most miscellaneous information. Whether one is investigating ancient painting, sculpture, and other fine arts; or the geography of the Roman Empire; or Roman triumphs, gladiatorial contests, and theatrical exhibitions; or the industrial processes of antiquity; or Mediterranean trade; or Italian agriculture; or mining in ancient Spain; or the history of Roman coinage; or the fluctuation of prices in antiquity; or the Roman attitude towards usury; or the pagan attitude towards immortality; or the nature of ancient beverages; or the religious usages of the ancient Romans; or any of a number of other topics; one will find something concerning all of them in Pliny. He is apt both to depict such conditions in his own time and to trace them back to their origins. Furthermore he repeats many detailed incidents of interest to the political or narrative historian of Rome as well as to the student of the economic, social, artistic, and religious life of antiquity. Probably there is no place where an isolated point is more likely to be run down by the investigator, and it is regrettable that exhaustive analytical indices of the work are not available. We may add that, although the work is supposedly a collection of facts, Pliny contrives to introduce many moral reflections and sharp comments on the luxury, vice, and unintellectual character of his times, suggesting Juvenal’s picture of degenerate Roman society and his own lofty moral standards.

As a repository of ancient natural science.

Indeed, Pliny’s title, Naturalis Historia, or at least the common English translation of it, “Natural History,” has been criticized as too limited in scope, and the work has been described as “rather a vast encyclopedia of ancient knowledge and belief upon almost every known subject.”[121] Pliny himself mentions in his preface the Greek word “encyclopedia” as indicative of his scope. Nevertheless, his work is primarily an account of nature rather than of civilization, and much of its information concerning such matters as the arts and business is incidental. Most of its books bear such titles as Aquatic Animals, Exotic Trees, Medicines from Forest Trees, The Natures of Metals. After an introductory book containing the preface and a table of contents and lists of authorities for each of the subsequent books, the second book treats of the universe, heavenly bodies, meteorology, and the chief changes, such as earthquakes and tides, in the land and water forming the earth’s surface. After four books devoted to geography, the seventh deals with man and human inventions. Four more follow on terrestrial and aquatic animals, birds, and insects. Sixteen more are concerned with plants, trees, vines, and other vegetation, and the medicinal simples derived from them. Five books discuss the medicinal simples derived from animals, including the human body; and the last five books treat of metals and minerals and the arts in which they are employed. It is thus evident that in the main Pliny is concerned with natural science, and that, if his work is a mine of miscellaneous historical information, it should even more prove a rich treasure-house—“quoniam, ut ait Domitius Piso, thesauros oportet esse non libros[122]—for an investigation concerned as intimately as is ours with the history of science.