From 1680 to 1850 is a long period of time for a particular style of timepiece to run without interruption or without displacement by any other fashion. It may naturally be supposed that during this period changes have occurred in form, in decoration, and in a score of minor details delightful to the collector and interesting to the student of form in design. The inception of the long case was due to the common use of the seconds pendulum. This required a certain space to swing in, and the pendulum was of a certain length. This undue length does not seem to have been necessary in the wall clock of the so-called "Act of Parliament" type, and as Lord Grimthorpe, the constructor of "Big Ben" at Westminster, says: "Spring clocks are generally resorted to for the purpose of saving length; for as clocks are generally made in England, it is impossible to make a weight clock capable of going a week, without either a case nearly 4 feet high, or else the weights so heavy as to produce a great friction on the arbour of the great wheel. But this arises from nothing but the heaviness of the wheels and the badness of the pinions used in most English clocks, as is amply proved by the fact that the American and Austrian clocks go a week with smaller weights and much less fall than English ones, and the American ones with no assistance from fine workmanship for the purpose of diminishing friction, as they are remarkable for their want of what is called 'finish' in the machinery, on which so much time and money is wasted in English clock-work."

Its Dutch Origin.—As we have before explained, the marquetry case came straight from Holland. Our "grandfather" was a Dutchman, as far as clock-cases go. The Dutchman Huygens is credited with having been the first to employ the pendulum in the mechanism of the clock. Leonardo da Vinci, that stupendous genius, left notes as to his study of the pendulum (1452-1520), and Galileo came with his later studies (1564-1642). It is a disputed point as to when and where the pendulum came into being. We must accept Huygens (1629-95) as the practical exponent of the pendulum, although not the original discoverer of its properties. But at any rate, the long-case clock may be generally accepted as coincident with the use of the long or seconds pendulum. And to Holland we must look for this habitual usage of the long wooden case to protect the weights and the pendulum.

Among the designs of Marot there are drawings of long-case clocks certainly more ornate than those usually associated with such an early period (this was about 1660 to 1680), and French Louis XIV and Louis XV tall clocks are built on these lines, and Chippendale at a later period found Marot an exceedingly prolific master of design to study.

The Changing Forms of the Hood, the Waist, and the Base.—The evolution of form in one class of object from one period to another is of exceptional interest. In furniture, in china, in glass, and in silver, the progression of forms is so marked as to give practically a date to each piece. The gate-leg table can be traced from three to twelve legs with double gates. The chair, from its straight oaken back and massive arms to the tapering legs and curves of the satinwood period, runs through stages as definitely marked as though the makers had signed the pieces. Now the stretcher is low, next it becomes higher, then it disappears altogether; or the splats in the back are single, then double, with cane panels, and then again upholstered. The top rail of the chair affords similar delectation to the connoisseur of form changing for a definite reason.

The clock-case underwent equal changes in character, not only in its decoration, as we have seen, in marquetry, in lacquer, and in veneers of burr-walnut and mahogany, but its proportions varied. At first, coming as it did in the walnut period, the hood had turned rails, in keeping with the turned rails of the chairs of the time. The hood was square and small, the waist was more slender, and the base in proportion. During the marquetry and the lacquered periods the hood began to grow larger and more dominant. It had a domed superstructure, and the finials or metal terminals were more ornamental and grew in number (see illustrations, pp. [133], [117]). The massive character of the early mahogany period, culminating with Chippendale, had its effect on the long clock-case. The hood had a pagoda-like edifice in the Chinese style (see illustration, p. [239]), or it had the woodcarver's adoption of architecture, as in the crest of the hood (see illustrations, pp. [145], [117]). The rail in the hood had become a Corinthian pillar, and later a pilaster. At the end of the eighteenth and beginning of the nineteenth century it had a new form: when it was turned mahogany it stood away from the case, as an ornament apart, rather than a supporting pillar (see illustration, p. [233]). This is a noticeable feature in country-made clocks of this period.

At first there was no door in the case. But on the introduction of the door, its panelled form commenced to make its progression in form in accompaniment with the other features of the case. It was square, in simple forms, with square hoods. In 1730 it took the form somewhat similar to the shape of the lowest marquetry panel, as shown in the clock by Jas. Leicester (see [Frontispiece]). It really follows the chair-backs of a period of some ten or fifteen years' prior date. It is an instance of the clock-case slightly lagging behind contemporary furniture design. The shapes of these panels resemble the chair-backs of the James II, William and Mary, and the Queen Anne period. In some instances the simple form becomes taller, terminating in a small semicircle. The Sussex iron fire-backs of the seventeenth century show similar forms of panel.

By 1770 the panel had lost its lunette or semi-circular form at top, and in outline resembled a Chippendale chair-back. The evolution is easily traceable. A similar fashion is observed in tombstones in old country churchyards. By the late eighteenth and early nineteenth centuries, especially in certain North of England type clock-cases, notably Lancashire and Cheshire, these panels are Gothic in character (see illustration, p. [231]). Following French fashion, in some late examples there is a glass panel (see illustration, p. [275]).

The base undergoes certain changes, though in a lesser degree. Sometimes plain, sometimes with a plinth, sometimes with feet. Dutch long clock-cases have great wooden balls as feet. In the Chippendale period the plinth has a suggestion of Chinese character. In later types the feet are more pronounced, and the base has an ornamental panel in the Sheraton period with a delicate marquetry inlay of simple character. In Sheraton's Design Book there are two clocks showing the base further ornamented by turned pillars similar to the hood.

The growing importance of these feet and their frequent use, especially in ornate examples, are shown in the specimens illustrated (pp. [133], [137]).