Flower comets

Comets are manufactured as follows Prepare a strong paper tube. Place a star at each end of the tube, charging a quantity of blackpowder grains between them. Close up both ends with pasted paper. Bore a hole into the tube at the side and insert a piece of fuse into it and secure it with a piece of hemp or epoxy res in(Fig. 83).  

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In this case the tube needs to be enlarged. Fig.84 shows a "flower comet which produces two small flowers,... 

This is a kind of Kyoku attached to a shell which displays effects on the trajectory. The word "Do" means here a trajectory. A silver tail, small flowers, comets, thunder, whistles etc. are commonly used as the Kyoku-do. The prefix "Ascending" is used, e.g. "Ascending silver tail", "Ascending comets" etc. 

Poka is a shell which displays willows, comets, parachute, reports, whistles, flags, bills etc. rather than a round flower. Poka has less bursting charge than Warimono, and the weight of the shell is only half as large as that of Warimono for the same size. 

People who design fireworks combine artistry with a technical knowledge of chemical properties. They have found ways to combine different colors within a single cylinder and to make parts of the cylinder explode at different times. Fireworks designers have a technical knowledge of projectile motion that is used to determine the height, direction, and angle at which a fireworks device will explode to produce a fan, fountain, flower, stream, comet, spider, star, or other shape. 

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