of a Turret Clock requires much careful forethought and experienced labour; because whatever oversight has been made by the architect in planning the clock-room must be made good by the clockmaker who has to fix up a public time-piece. In the first place the latter will take care that the supports of the clock shall be sufficiently strong and free from vibration, and that the movement shall be bolted securely to the iron girders, or strong oak beams provided for the purpose; he will remember that when it is intended that the clock shall strike the hours and quarters, that the bell or bells should be hung as high in the tower as possible, so that when the stroke of the hammer is given by a perfect fall of the weights, the louvres of the tower should be so arranged as to bring out the full sound of the bell, as in the case of the bell at St Paul's cathedral, which, though only weighing 5 tons 4 cwts., is frequently heard on clear nights as far as Windsor. He will in a word require to be acquainted with all the points of importance attached to his rather intricate duty, or he may by failure render nugatory the best workmanship that could be bestowed in clockmaking. The wiser arrangement as to clock-fixing is to intrust the duty to the clockmaker, and he will then necessarily bear the sole responsibility of any mistake. THE WINDING and keeping in order is, as we have said, a less laborious task as respects modern clocks than those which were made fifty years ago, inasmuch as, although it is the duty of a clock-winder to watch daily the action of the time-piece under his charge, he need not perform his winding duties oftener than once a week. He must be on the alert to observe any effect produced by the action of the wind or the fall of snow upon the hands of the clock, which under certain conditions is not uncommon; he must note by some good regulator any tendency to variation in the Church clock, and he must also observe the Equation of Time, which is the difference between true and mean solar time for each day, and which is not quite the same for every year, because it moves on about a quarter of a day in each year until leap year comes and puts it back again. The Equation may be reckoned by an Equation Table, or by the time mentioned in the Almanacs as 'clock before' or 'clock after sun.' It is obviously a very important requisite for good time-keeping that good horological instruments shall be intrusted to skilful and careful hands. In many instances it has happened that escapements made upon the truest scientific principles, and set going in thorough working order, have been so injured by the mechanical genius of the village (some blundering sexton, or some jack-of-all-trades, whose education in mechanism must be exercised at the parish expense), that the new clock with all its merits has been seriously damaged. In such a case the clockmaker had better be at once consulted. A MODERN TURRET CLOCK DESCRIBED.