Fifth Mutation
Is a fixed piece called the porcupine’s quills; this piece consists of twelve spokes, standing perpendicular to the block in which they are fixed; on each of these spokes, near the end, must be placed a four ounce case of brilliant fire; all these cases must incline either to the right or left, so that they may all play one way.
Sixth Mutation
Is a standing piece called the cross fire. This mutation consists of eight spokes fixed in a block; near the end of each of those spokes, must be tied two four ounce cases of white charge, one across the other, so that the fires from the cases on one spoke, may intersect the fire from cases on the other.
Seventh Mutation
Is a fixed wheel, with two circular fells, on which are placed sixteen eight ounce cases of brilliant fire, in the form of a star: this piece is called a fixed star of wild fire.
Eighth Mutation.
This is a beautiful piece, called a brilliant star piece, it consists of six spokes, which are strengthened by two fells of a hexagon form at some distance from each other; at the end of each spoke, in the front, is fixed a brilliant star of five points; and on each side of every star is placed a four ounce case of black or grey charge; these cases must be placed with their mouths side ways, so that their fires may cross each other.
Ninth Mutation
Is a wheel piece; this is composed of six long spokes, with a hexagon vertical wheel at the end of each; these wheels run on spindles in the front of the spokes; all the wheels are lighted together: two ounce cases will do for these wheels, and may be filled with any coloured charge.