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It has been remarked by an eminent entomologist, that natural history, which, during the long series of ages in which barbarism reigned, shared the fate of the other sciences, underwent the same treatment when a taste for knowledge began to revive. For example, it was chiefly in Aristotle that the history of animals was sought; whereas, if Aldrovandi, Gesner, Moufet, and other physiologists, had studied nature as much[Pg 124] as they studied the ancient writers, the assiduous labour of so many active minds would have secured for that science a more sure and rapid progress. The material world was then observed only for the purpose of confirming the reports made by the authors of antiquity. At length Nature opened the eyes of those who were trying to see in her only what they had seen in Aristotle and Pliny. She disclosed to them facts worthy of being noticed, which they vainly sought in the books which they imagined to contain every thing; and unfolded others, which gave them reason to doubt the truth of those that had been transmitted from former ages. After having thrown off the fetters of authority, farther, perhaps, than was quite consistent with the respect that was really due to the ancients, men perceived that they ought to study facts, verify whatever had been related, and try to discover more. It was thus that Malpighi, Swammerdam, Redi, and other illustrious authors proceeded. Even those, such as Goedart and Madame Merian, who, from an ignorance in some degree fortunate, were unable to read the ancients, laboured with advantage as observers.[H]

The subject of this memoir was born at Amsterdam on the 12th February 1637. His father, an apothecary, was fond of natural history, and, being in prosperous circumstances, embellished his house with preserved animals, shells, and minerals, insomuch that it became an object of attraction to the curious. Young Swammerdam was intended for the church, and received instructions in the Greek and Latin languages, to qualify him for the study of divinity; but, on seriously considering[Pg 125] the importance of the task designed for him, he judged himself incapable of discharging the duties of a religious instructor. On representing the matter to his parents, he received their permission to commence the study of medicine. Being frequently employed in cleaning and arranging his father's cabinet, he gradually acquired a liking to natural history, and even at an early age began to form a collection of insects, which he disposed into classes, agreeably to ideas derived from observation and the descriptions of authors. Day and night he pursued his favourite employment, searching the woods and fields, the sandhills and muddy shores, the lakes, rivers, and canals, for insects, worms, and mollusca, until he acquired, even while a youth, a more extensive and more accurate knowledge of the lower animals than all the naturalists who had preceded him.

In 1661, he went to Leyden, for the purpose of attending the lectures at the celebrated university of that city. There he remained two years, studying surgery with Van Horne, and medicine with Franciscus Sylvius de le Boe, with as much diligence as he had previously displayed in his other pursuits. During the whole of this time he enjoyed the friendship of Steno and De Graaf; and, becoming much attached to the study of anatomy, he exerted his utmost ingenuity in devising means for effectually preserving his preparations.

He then went to Paris to improve himself in his profession. There he continued the examination of insects, and had the good fortune to discover the valves in the lymphatic vessels. After this he resided for some time at Lyons, where he lived on terms of intimacy with Thevenot the celebrated traveller, who introduced[Pg 126] him to the learned men by whom his house was frequented. In their society he usually remained a listener, and could not be prevailed upon to communicate his ideas; but, being repeatedly urged to exhibit one of his minute dissections, he gratified the wishes of his friends, and, by the profound knowledge which he displayed, acquired at once their esteem and admiration. Thevenot recommended him to Van Beuningen, a senator at Amsterdam, who, on his returning to that city, obtained permission for him to examine the bodies of patients dying in the hospital,—an opportunity of increasing his knowledge which he took care not to neglect.

In his native town he frequented a society of medical men, who met once a-fortnight for the purpose of discussing subjects connected with their profession, and made observations on the structure of the spinal marrow and nerves, on respiration, and on the effects produced by the injection of fluids into the blood-vessels of animals.

About the end of 1666, he returned to Leyden with the view of obtaining his medical diploma, and there continued his researches in company with his former teacher, Van Horne, in whose house he injected the uterine vessels with wax,—a method of showing the distribution of the arteries and veins afterwards greatly improved by him, and which has been productive of much advantage in the study of anatomy. In February 1667, he received the degree of doctor, and in March published his thesis on respiration, which he dedicated to Thevenot. He next invented a new method of preserving anatomical subjects by inflating them with air. But the eagerness with which he engaged in these occupations[Pg 127] was prejudicial to his health, and he was seized with a quartan ague, which reduced him to a state of extreme debility. On recovering from this disease, he remitted his professional studies for two years; resuming the investigation of insects, the structure of which he unfolded with astonishing precision and success.

It happened about this time that the Grand Duke of Tuscany visited Amsterdam. Accompanied by Thevenot, he examined the collections made by Swammerdam and his father, and was so struck by the wonderful dissections of insects that he offered 12,000 florins for the museum, on condition that its proprietor should accompany it to Florence, and take up his residence in the palace. But the young naturalist had been no much accustomed to roam about at will, that he could not relinquish his liberty, and therefore refused the offer.

In 1669, he published his General History of Insects, which he dedicated to the senate of Amsterdam. The expense which he incurred in procuring specimens from all quarters, while no emoluments resulted from his labours, so displeased his father, that he earnestly urged him to relinquish his unprofitable pursuits, and engage in the practice of medicine. At length, finding him unwilling to follow his advice, he was obliged to threaten a total intermission of supplies; though by this time the ardent student had fallen into such a state of debility that he was totally unfit to undergo the fatigues of practice. He was, however, sensible of the propriety of the counsel which was administered to him, and retired to the country to recruit his strength; but he had scarcely arrived when he recommenced his studies, being[Pg 128] wholly unable to resist the temptation offered by solitude and by the presence of the objects which invited his research. In the mean time, Thevenot, being made acquainted with these circumstances, urged him to return to France, generously offering him every thing necessary to enable him to follow the bent of his genius. His father, however, did not approve of this scheme, which was therefore relinquished; but the son did not the less continue to pursue his former occupations.