First have two hoops made of strong iron wire, one of six feet diameter, and one of four feet two inches; these hoops must be joined to scroles A, A, A, &c. as shewn by fig. 54. These scroles must be made of the same sort of wire as the hoops; on these scroles, tie with iron binding wire as many illuminating port fires as they will hold, at two inches distance from each other; these port fires cloath with leaders, so that they may all take fire together; then let C be a circular wheel of four spokes, three feet six inches diameter, and on its fell tie as many four ounce cases head to tail, as will compleat the circle, only allowing a sufficient distance between the cases, that the fire may pass free, which may be done by cutting the upper part of the end of each case a little shelving: on each spoke fix a four ounce case about three inches from the fell of the wheel; these cases are to burn one at a time, and the first of them to begin with those on the fell, of which four are to burn at a time, so that the wheel will last no longer than one fourth of the cases on the fell, which in number should be sixteen or twenty; on the front of the wheel form a spiral line, with strong wire, on which tie port fires, placing them on a slant, with their mouths to face the same way as the cases on the wheel; all these port fires must be fired with the second cases of wheel. Let D, D, D, &c. be spokes of wood, all made to screw into a block in the center; each of these spokes may be in length about four feet six inches; in the top of each fix a spindle, and on each spindle put a spirali wheel of eight spokes, such as are represented by E, E, E, &c. The blocks of these wheels must have a hole at top for the center cases, and the spindle must have nuts screwed on their ends, which nuts should fit in the holes at top of the blocks, so that all the wheels, must be put on before you fix in the center cases: as some of these wheels by reason of their situation will not bear on the nut, it will be necessary to have smooth shoulders made on the spindles for the blocks to run on; the cases of these wheels are to burn double, and the method of firing them is, by carrying a leader from each down the spokes into the block in the center, in the same manner as those in the dodecaedron, but the center case of each wheel, must begin with the two last cases as usual; it is to be observed, that the large circular wheel in front must have a tin barrel on its block, into which a pipe must be carried, from one of the second cases on the wheel; this pipe being met by another from the large block, in which the eight spokes are screwed, will fire all the spirali wheels and the illuminating port fires at the same time. The cases of the projected wheel may be filled with a white charge, and those of the spirali wheels, with a grey. Of the Moon and Seven Stars.