234 ROCKETS TO REPIIESENT FIGURES IN THE AIR. 



some time on the water, shall throw out sparks and stars ; and these 

 after they catch fire shall ascend into the air. This may be done 

 by dividing the rocket into two parts, by means of a round piece 

 of wood, having a hole in the middle. The upper part must be 

 filled with the usual composition of rockets, :ind the lower with 

 stars, which must be mixed with grained and pulverised gun. 

 powder, &c. 



3. A rocket which takes fire in the water, and, after burning 

 there half the time of its duration, mounts into the air with great 

 Telocity, may be constructed in the following manner. 



Take a flying rocket, furnished with its rod, and by means of a 

 little glue attach it to a water rocket, but only at the middle, in 

 such a manner, that the latter shall have its neck uppermost, and 

 the other its neck downward. Adjust to their extremity a small 

 tube, to communicate the fire from the one end to the other, and 

 cover both with a coating of pitch, wax, &c. that they may not be 

 damaged by the water. 



Then attach to the flying rocket, after it has been thus cemented 

 to the aquatic one, a rod of the kind described in the second ar. 

 tide ; and suspend a piece of pack-thread, to support a musket 

 bullet made fast to the rod by means of a needle or bit of iron 

 wire. When these arrangements have been made, set fire to the 

 part after the rocket is in the water; and when the composition is 

 consumed, the fire will be communicated through the small tube to 

 the other rocket : the latter will then rise and leave the other, 

 which will not be able to follow it on account of the \yeight ad* 

 Jjcring to it, 



SECTION IV. 



By means of Rockets, to represent several figures in the Air. 



IF several small rockets be placed upon a large one, their rods 

 being fixed around the large cartridge, which is usually attached to 

 the head of the rocket, to contain what it is destined to carry up 

 into the air ; and if these small rockets be set on fire while the large 

 one is ascending, they will represent, in a very agreeable manner, 

 a tree, the trunk of which will be the large rocket, and the branches 

 the small ones. 



If these small rockets take fire when the large one is half burned 

 in the air, they will represent a comet j and when the large oiie in 



