Cologne, Bruges, Ghent, and Antwerp became centres of manufactures and commerce; whilst the origin of the Hanseatic League gave a new impulse in the north to the progress of the useful arts. In the early part of the fourteenth century a system of trading commenced between the north and south of Europe; and the free application to navigation of the discovery of the magnetic needle—a discovery made in Europe about A. D. 1200, and long unapplied—vastly increased commercial intercourse, and, as a necessary consequence, the home manufactures of nations. The Italian towns, especially Venice, Pisa, and Genoa, first raised to importance by the Crusades, took a leading part in the general movement, and became the channels through which the East poured her riches and the knowledge of her arts into Europe. The southern French provinces were not behindhand. Marseilles—where the spirit at commercial enterprise had never wholly died away—Narbonne, Nismes, and Montpellier, were all distinguished for prosperity and growing wealth. The invention of a system of banking, which we find in operation so early as 1400 A. D., deserves to be mentioned, as one of the most influential causes of the rapid growth which followed. England, indebted to her neighbors for the origin of so many of her manufactures, entered the lists late, though destined eventually to outstrip all competitors.

During the unsettled periods at which we have been glancing, agriculture was, of course, neglected; but toward the end of the thirteenth century we find that it has shared in the general revival, and that the plains of Lombardy present the appearance of one vast garden. Indeed, the prospect of Italy was then far more pleasing than that which there meets the traveler’s eye in our own times.

A few words on the progress of the art of building. The first Gothic architecture—correctly so named—appears to have arisen from an imitation of Roman remains, and the combination therewith of rude barbaric notions. The round arch still remained the predominant feature of construction; and the less finished works of this period, with their undeveloped style, deserve the name of “Gothic,” which is now generally restricted to the designation of them. In the twelfth century, however, the introduction of the pointed arch marked a new era in the art of building, and was the beginning of that skill and taste which produced the magnificent architectural monuments inherited by us from the middle ages. Clustered pillars, carved mullions, foliations, and graceful tracery, quickly followed the introduction of this new element; and the union of strength with lightness, of which the flying buttress affords a beautiful example, was carried to as high a point of perfection as the material would allow. To the introduction of the pointed arch Venice may, perhaps, lay claim; and the rise of her palaces amid the waters of the Adriatic, probably marked the origin of many other improvements in construction. One of these, which lies at the very root of modern skill in house building—we mean the framing of timber floors—may be assigned to her artificers. Houses were thenceforward built in stories, and skill in this respect soon issued in domestic works, which in utility and outward beauty surpassed the ancient dwellings. These improvements were soon adopted elsewhere, from the ninth and tenth centuries downward.

The Moorish architecture, introduced into Europe by the Arabian conquerors of Spain, early attained a high development. One singular characteristic of this style,—the horse-shoe arch—must be specially mentioned, as a new feature in construction; and its shape was, perhaps, suggestive of the dome, universal in the later Mohammedan architecture. Slender pillars, profuse decorations in painting, mosaic, and stucco, with elaborate lattice and trellis-work, and perforated battlements, so intricate as to resemble network, are the other points for remark in Moorish buildings. The polish and refinement of the Saracens distinguished them wholly from the rude barbarians of the North. They did not invade to destroy, but to improve; and so early was the development of their architecture, that one of their most splendid remains, the mosque at Cordova, was erected in the beginning of the ninth century—a period which could show nothing so beautiful elsewhere. The celebrated Alhambra—the palace of the Moorish kings of Granada—is some three centuries later, and must be alluded to here as the highest development of the luxurious Eastern style. The perfect state in which parts of this celebrated Moorish palace still remain, is elegantly thus described by a modern writer,[[12]] in his notice of the “Court of Lions” and the surrounding halls:—“Here the hand of time has fallen the lightest, and the traces of Moorish elegance and splendor exist in almost their original brilliancy. Earthquakes have shaken the foundations of this pile, and rent its rudest towers; yet, see, not one of those slender columns has been displaced—not an arch of that light and fragile colonnade has given way; and all the fairy fretwork of these domes, apparently as unsubstantial as the crystal fabrics of a morning’s frost, yet exist, after the lapse of centuries, almost as fresh as if from the hand of the Moslem artist.”

In following the course of invention and rediscovery during the middle ages, and in subsequent times, we see two main causes of the superiority of our own useful arts to those of the ancients—the extended application of mechanical and chemical science. The discovery of the various problems in mechanics, which paved the way for the multiplication of human force, and the introduction of new motor powers, occupied chiefly the latter half of the sixteenth and the seventeenth century. The treatises of Stevinus and Galileo, with the first dawnings of the discovery of the steam-engine, appear to mark a new era, and prepare the way for those wonderful applications of moving power which have changed the face of the manufacturing world. The subsequent train of discovery is far too comprehensive for our limits, and ends at length in that crowning development of machinery—the Calculating Machine of Mr. Babbage. We need only mention that, by this extraordinary instrument, some processes of numeric and algebraic calculation may be effected, to an extent hitherto unattainable by mathematicians.

A short view of the progress of the art of clockmaking, will well illustrate a gradual advance made in the application of mechanics to the uses of daily life. Striking clocks were known in Italy probably as early as the end of the thirteenth century—one other strong proof that we must date the revival of arts much earlier than that period. Their existence becomes certain about the middle of the fourteenth; probably at that period they were general. These clocks were all moved by the action of weights; and, though furnished with balance regulators, were still very inaccurate. Next followed the introduction of a spring as the moving power, marking a new era in the art. Then came the age of mechanical discovery, producing Galileo’s observation of the vibration of the pendulum in nearly equal times, whether the spaces traveled through were large or small. So valuable a discovery could not long remain dormant; and we find, accordingly, that it was applied by the discoverer, or, in a better form, by Huyghens, to the regulation of time-pieces by means of the pendulum. The advance of chemical science soon showed a source of error in the unequal size of the pendulum, caused by alternate expansion and contraction of the metal due to change of temperature. This was remedied by the use of the jar filled with mercury as a pendulum; and subsequently by the employment of a pendulum formed of different metals, so arranged that their different expansions should mutually balance each other. The mutual connection between the art of making clocks and the science of astronomy, in which each has alternately borrowed and lent so much, is an excellent illustration of the many points in which the useful arts are brought into contact with higher provinces. The remaining improvements would fill volumes, and we cannot pretend to enter more fully into them.

In our estimate of causes at work during the middle ages, we must not forget that the alchemists exercised a very important influence. Their doctrine, that all the metals are compounds of the constituent parts of gold mingled with baser matters, which could be separated by the action of the philosopher’s stone, exercised eventually a powerful influence on the progress of arts. The long and patient research of the “adept” after this magic agent for turning all it touched to gold, though prompted by cupidity, resulted in many chemical discoveries and adaptations, and brought to light various useful products, for which, perhaps, we might long have waited, had not this strong motive been rooted in the minds of philosophers of the middle ages.

The invention of printing will be noticed elsewhere; and the comparative state of the useful arts in Europe may be estimated from their history in our own country. It remains for us here to notice, in a supplemental manner, one or two branches of art which will not be elsewhere included. By this means we shall better illustrate a subject into which we cannot pretend to enter fully.

In the preceding pages, the use of silk by the Greeks and Romans has been merely glanced at, because the tissues which they employed were strictly of foreign production. We will now shortly notice a manufacture, the history of which will illustrate many preceding remarks. Its origin must be assigned to China, where it doubtless reached a highly perfect state, before any other nations acquired an acquaintance with the mode of producing or working the raw material. It is probable that silk-worms were reared in China, and their cocoons extensively employed, 2700 years before the Christian era. The raw material subsequently was exported to Persia, Tyre, Berytus, and elsewhere, till, in our westward progress, we find the island of Cos receiving and manufacturing it. In the Augustan age silks were still rare, even in Rome, the centre of all luxuries; and so late as the third century it was deemed a display of wanton profusion for an emperor to dress entirely in silk.

In the sixth century, some Persian monks, who had penetrated into China, gained an acquaintance with the source whence silk is derived—a secret till then guarded with scrupulous care. They brought back with them to Constantinople a quantity of eggs enclosed in a hollow cane, which produced “the progenitors of all the generations of silk-worms which have since been reared in Europe and the western parts of Asia.” For nearly six hundred years, Constantinople and the territories of the Greek empire continued to monopolize the production of silken fabrics; till, in the twelfth century, the manufacture was introduced into Sicily, and thence successively into Italy, Spain, and France; until, finally, it reached England. The culture of the mulberry-tree was extensively introduced wherever the climate permitted. Bologna, Modena, Venice, Genoa, and Florence were all noted for their silk manufactures, and produced silken tissues for the rest of Europe; till, in the sixteenth century, the rearing of the worm and the weaving of silk were introduced into Lyons and the south of France, since which period the French have acquired and maintained a superiority in this branch of the useful arts. In this historical sketch we may observe many important points:—First, we see a manufacture in a stationary state of high perfection for thousands of years in the East; then follows its slow progress westward during the ages of Greece and Rome; next the loss to Italy and Europe of the bare knowledge of the material product, on the fall of the Roman empire; then the revival and cultivation of the manufacture in the metropolis of the Eastern empire; succeeded by its introduction thence into Sicily, and a rapid improvement effected by the enterprise of Italian cities; till, finally, it spread wherever circumstances were favorable. The account of any such manufacture well remembered, is a kind of epitome of the history of the time through which we mark its progress. To make the sketch true in all its parts we need only add, that a Frenchman invented a loom to make woven silks, whose patterns rival the slow produce of Eastern patience, while England has shown her accustomed superiority in the effecting by machinery of all processes required antecedent to weaving.