before I have shewed: then each Team may be placed 720 ways in the Cart, and not twice alike, which is to be done according to the methods whereby the 720 changes on six Bells are rung. So that 38760, which are the number of Teams, multiplied by 720, which are the number of ways to vary the six Horses in each Team, the product will be 27907200, which are the compleat number of Teams; and every Team carrying one Load, consisting of five hundred Bricks, the Whole will amount to 13953600000 Bricks. And after the proportion of a hundred and fifty thousand of Bricks to a House, they would build ninety three thousand and twenty four Houses; which are above six times as many as the late dreadful fire in _London_ consumed. And at the rate of thirteen shillings and four pence the thousand, they are worth 6976800 pounds Sterling, which is at least four hundred Waggon-loads of money, as much as five Horses can ordinarily draw. [Illustration: [Fleuron]] AN INTRODUCTION To the Practice of RINGING As the original design of casting Peals of Bells was in order to make pleasant Musick thereon; so the Notes in every Peal are formed apt for that end and purpose, every Peal of Bells being tun’d according to the principles of Musick; for in a Peal of six Bells are the six plain Song-Notes, whereupon all Musick consists, namely, _la sol fa mi re ut_. But in regard that in ringing of them the Notes cannot be had at command, as the Notes of other Instruments may; therefore, as the Practitioners in ancient time found some necessity to cause all the Notes to strike successively after one another, so likewise they thought fit in ringing them to place the Notes in this following order. The least note to lead or strike first, then the Note which is the next degree deeper or flatter, and so the rest of the notes to strike after each other according to their degrees, the flattest striking last; in which order the notes were successively reiterated both at fore-stroke and back-stroke, from the beginning to the end of each Peal. And at this day the same order is also observed in raising, ceasing, and ringing them at a low compass; wherein each note being confin’d to strike in a certain place, therefore had they their terms of First, Second, Third, Fourth, Fifth, _&c._ given them, to denote their order and places of striking; from whence also the Bells derive those terms of distinction by which they are now known. Although the ringing of a Peal of Bells in the aforesaid order, (which is commonly term’d _Round-ringing_) is in it self Musical; yet the Notes may be so placed in ringing, that their Musick may be rendred much more pleasant: for in Musick there are Concords, which indeed may be term’d the very life and soul of it, that renders all Musick exceeding pleasant: the principal are Thirds, Fifths, and Eights; Thirds are 1 3. 2 4.