The first fruits of Greek botany.

Theophrastus of Eresus in Lesbos, born about 370 BC, is the author of the most important botanical works that have survived from classical antiquity. He was in turn student, collaborator, and successor of Aristotle. Like his predecessor he was interested in all aspects of human knowledge and experience, especially natural science. His writings on plants form a counterpart to Aristotle’s zoological works.

In the Enquiry into Plants Theophrastus classifies and describes varieties—covering trees, plants of particular regions, shrubs, herbaceous plants, and cereals; in the last of the nine books he focuses on plant juices and medicinal properties of herbs. This edition is in two volumes; the second contains two additional treatises, On Odours and Weather Signs.

In De causis plantarum Theophrastus turns to plant physiology. Books 1 and 2 are concerned with generation, sprouting, flowering and fruiting, and the effects of climate. In Books 3 and 4 Theophrastus studies cultivation and agricultural methods. In Books 5 and 6 he discusses plant breeding; diseases and other causes of death; and distinctive flavors and odors. The Loeb Classical Library edition is in three volumes.

Theophrastus’ celebrated Characters is of a quite different nature. This collection of descriptive sketches is the earliest known character-writing and a striking reflection of contemporary life.

Classic political realism.

Thucydides of Athens was born about 471 BC. He saw the rise of Athens to greatness under the inspired leadership of Pericles. In 430, the second year of the Peloponnesian War, he caught and survived the horrible plague that he described so graphically. Later, as general in 423 he failed to save Amphipolis from the enemy and was disgraced. He tells us about this, not in volumes of self-justification, but in one sentence of his history of the war—that it befell him to be an exile for twenty years. He then lived probably on his property in Thrace, but was able to observe both sides in certain campaigns of the war, and returned to Athens after her defeat in 404. He had been composing his famous history, with its hopes and horrors, triumphs and disasters, in full detail from first-hand knowledge, along with the accounts of others.

The war was really three conflicts with one uncertain peace after the first; and Thucydides had not unified them into one account when death came sometime before 396. His history of the first conflict, 431–421, was nearly complete; Thucydides was still at work on this when the war spread to Sicily and into a conflict (415–413) likewise complete in his awful and brilliant record, though not fitted into the whole. His story of the final conflict of 413–404 breaks off (in the middle of a sentence) when dealing with the year 411. So his work was left unfinished and as a whole unrevised. Yet in brilliance of description and depth of insight this history has no superior.

The Loeb Classical Library edition of Thucydides is in four volumes.

A Roman layman’s account of medicine in his time.

A. Cornelius Celsus was author, probably during the reign of the Roman Emperor Tiberius (AD 14–37), of a general encyclopedia of agriculture, medicine, military arts, rhetoric, philosophy, and jurisprudence, in that order of subjects. Of all this great work there survives only the eight books on medicine (De Medicina).

In Book I, after an excellent survey of Greek schools (Dogmatic, Methodic, Empiric) of medicine come sensible dietetics that will always be applicable. Book II deals with prognosis, diagnosis of symptoms (which he stresses strongly), and general therapeutics. Book III addresses internal ailments, fevers, and general diseases. Book IV treats local bodily diseases. Next come two pharmacological books, Book V on treatment by drugs of general diseases, and Book VI on local diseases. Books VII and VIII deal with surgery; these books contain accounts of many operations, including amputation.

Celsus was not a professional doctor of medicine or a surgeon, but a practical layman whose On Medicine, written in a clear and neat style for lay readers, is partly a result of his medical treatment of his household (slaves included), and partly a presentation of information gained from many Greek authorities. From no other source can we learn so much of the condition of medical science up to his own time.

The Loeb Classical Library edition of Celsus is in three volumes.