Revolving Courantines.
9. REVOLVING COURANTINES.
These, while they fly along the line in a straight direction, are, by a simple application of another Rocket, caused to revolve, or turn round at the same time. This rotatory motion is easily effected, by fixing to the cases another Rocket, which must be placed in a transversal direction; the aperture of which, instead of being at the bottom, like those on the cylinder, must be made in the side, near one of the ends. This transversal Rocket must be filled with a very slow charge, or it will be consumed long before those are upon the cylinder; when several changes in the runners are intended, two should be fixed in the transversal direction; their diameters should be small, in proportion to their lengths.
The Courantines may be made to revolve by other means equally simple and effective. Prepare and fill a case the same as those for Catherine Wheels, and wind and tie it nicely round the Courantine; this, when lighted with the first case, will cause it to revolve in a very pleasing manner.
When the Courantines do not revolve, they may be made to carry on the upper side a Jet of Fire, or any other ornament which the operator may devize; taking care to suspend, by means of wire, a small weight to the under side, which will keep it always in an erect position.