Caduceous Rockets They Are Such As In Rising Form Two Spiral

lines, by reason of their being placed obliquely, one opposite to the

other; and their counterpoise in the centre, which causes them to rise

in a vertical direction. Rockets for this purpose must have their ends

choked close, without either head or bounce; for a weight at the top

would be a great obstruction to their mounting. No caduceous rockets

ascend so high as single, because of their serpentine motion, and

likewi e the resistance of air, which is much greater than two rockets

of the same size would meet with if fired singly.



The sticks for this purpose must have all their sides equal, and the

sides should be equal to the breadth of a stick proper for a

sky-rocket of the same weight as those you intend to use, and made to

taper downwards as usual, long enough to balance them, one length of a

rocket from the cross stick, which must be placed from the large stick

six diameters of one of the rockets, and its length seven diameters;

so that each rocket, when tied on, may form, with the large stick, an

angle of 60 degrees. In tying on the rockets, place their heads on the

opposite side of the cross stick; then carry a leader from the mouth

of one into that of the other. When these rockets are to be fired,

suspend them between two hooks, or nails, then burn the leader through

the middle, and both will take fire at the same time. Rockets of 1 lb.

are a good size for this use.