May be made of any size; one made according to the Dimensions of [fig. 3d], will be a good proportion, whose whole height is twenty one feet; from C to D, six feet, from E to F, nine feet, the space between the rails must be six inches, and the rails as thin as possible, in all the rails stick port-fires at four inches distance; the archimedian screws G, K, are nothing more than double spiral wheels, with the cases placed on their wheels horizontally instead of obliquely, the vertical sun I, need not consist of more than twelve rays, to form a single glory; the globe at top must be made in proportion to the pyramid, which being prepared according to the preceding directions, place your leaders so that all the illuminating port-fires, screws, globe, and sun, may take fire together; the pyramid must be supported by the two sides, and by a support brought from a pole, which must be placed two feet from the back of the pyramid, in order that the wheels may run free.
Rose-Piece and Sun.
A rose piece may be used for a mutation of a regulated piece, or fired by itself, this piece makes the best appearance when made large; if its exterior diameter be six feet it will be a good size; [fig. 4], shews the manner it appears before it is fired; let the exterior fell be made of wood, and supported by four wooden spokes, all the other parts on which the illuminations are fixed, must be made of strong iron wire; on the exterior fell, place as many half pound cases of brilliant charge as you think proper (but the more the better) for the nearer the cases are placed, the stronger will be the rays of the Sun; the illuminations should be placed within three inches of each other, they must be all fired together and burn some time before the sun is lighted, which may be done by carrying a leader from the middle of one of the illuminations, to the mouth of one of the sun cases.
Transparent Stars with Illuminated Rays.
[Plate 7], Fig. 5th, represents an illuminated star, let the diameter from A to B, be two feet and from C to D, seven feet; first make a strong circular back or body of the star, two feet diameter, to which you fix the illuminated rays; in the center of the front of the body fix a spindle, on which put a double triangular wheel, six inches diameter, clothed with two ounce cases of brilliant charge; the cases on this wheel must burn but one at a time; round the edge of the body nail a hoop made of thin wood or tin, this hoop must project in front six or seven inches; in this hoop cut three or four holes to let out the smoke from the wheel; the star and garter may be cut out of strong paste-board or tin, made in this manner, cut a round piece of paste-board or tin, two feet diameter, on which draw a star, and cut it out, then over the vacancy paste Persian silk; paint the letters yellow; four of the rays yellow, and four red; the cross in the middle may be painted half red, and half yellow, or yellow and blue; this transparent star must be fastened to the wooden hoop by a screw, to take off and on, the illuminated rays are made of thin wood, with tin sockets fixed on their sides within four inches of each other; in these sockets stick illuminating port-fires; behind the point of each ray, fix a half pound case of grey, black, or chinese fire.
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N. B. The illuminated rays to be lighted at the same time as the triangular wheel, or after it is burnt out, which may be done by a tin barrel being fixed to the wheel after the manner of those in the regulated pieces, into this barrel correl a leader from the illuminated rays, through the back of the star, which leader must be met by another brought from the tail of the last case on the wheel.
Transparent Table Star Illuminated.
[Fig. 6th], represents a table star, whose diameter from E to F, is twelve feet, and from E to I, four feet, this proportion observed on each side, will make the center frame four feet square, in this square fix a transparent star, as shewn in the figure; this star may be painted blue, and its rays made as those of the flaming stars described in page 218, the wheel for this star may be composed of different coloured fires, with a change or two of slow fire; the wheels a, a, a, a, may be clothed with any number of cases, so that the star wheel consists of the same; the illuminating port fires, which must be placed very near each other on the frames, must be so managed as to burn as long as the wheels, and lighted at the time.
The Regulated Illuminated Spirili Piece, with a projected Star Wheel Illuminated.