The diameter of the hollownesse of the morter Peece must be one foot, the longer it is the further it will carry. Let the diameter of the hollownesse of the sacke be the third part of a foot, and halfe a foot deepe: it must have a square foot, and a portfire to strew into the bottome of the sacke on the side of it; this portfire is to be made like a cane about three inches long, and have a bottome sodered unto the inside of the screw, which bottome must be pierced with a small touch hole. This morter peece may be made of yron, red copper, or for a neede with pastbord, armed with cord, and glewed ouer, but the sack, and foot of it must bee made of wood, and the pastbord morter must bee nayled fast upon it. A Balloone must be made of canuasse rowled eight or nine times upon a Former, it must bee made so, that it will easily go into the morter peece; into this Balloone you may put Rockets, Serpents, Starres, Fiends, Petards, and one or two Saucissons to breake the Balloone; then choak it up with cord, and prime it with a little cane rammed full of a slow composition; fill the stock of the morter peece full of whole gunpowder, then screw on the portfire, O, then put the Balloone down to the bottom of the morter with the cane that primeth it, downward into the stock; then with tallow or grease stop the chinks between the Balloone and the morter, and it is ready to bee discharged, which you may do by putting fire to the portfire, and while that burneth, retreat out of harmes way. [Illustration] A, the figure of the morterpeece with its portfire, O. B, C, a Balloone ready made. D, an empty coffin for a Balloone. ------------------------------------------------------------------------ Of Fire-works for the earth. _How to make Rockets for the earth._