Between the small wooden Dutch Clock of the value of but a few shillings, and the carefully-made Regulator Clock which costs ten times as many pounds, there is necessarily a wide difference; but both may be considered as within the general designation, 'House Clocks.' The former sometimes go for many years with a fair amount of regularity, and are found to be useful to the humblest classes, whose hours for early morning labour are frequently regulated thereby. The latter are made with such accuracy as to correct the time of other clocks, such as turret and church clocks, which are more exposed to the influence of the weather, and are necessarily made upon a coarser scale. In large mansions there is no handsomer or more necessary appointment for the hall or vestibule than a fine eight-day clock, 'to welcome the coming, speed the parting guest,' and to give the time of day to the entire household. It would be worth while, did our purpose admit of it, to write a chapter on the longevity of Clocks, by way of showing the comparative cheapness of the solid, well-built piece of mechanism whose every item has been carefully put together of the very best and most durable materials by the most skilled horologers. For generation after generation such a sound, well-made time-piece shall keep accurate time, and put to shame by both its performance and the insignificant expense of keeping it in order, the instruments of, it may be, more showy appearance, but less careful construction. Such a clock descends from father to son until its own age is scarcely to be remembered, and is regarded as one of the family heir-looms,--nay, as more,--almost, we would say, as a friend familiar with all the scenes and experiences which have made up family history. It was of such a clock that Longfellow wrote-- 'By day its voice is low and light, But in the silent dead of night, Distinct as a passing footstep's fall, It echoes along the vacant hall, Along the ceiling, along the floor, And seems to say, at each chamber-door, For ever--never, Never, for ever.'