PYKOTECHNY G83 



with quick matches. Glories are large suns with several rows of fusees. Fans are 

 portions of a sun, being sectors of a circle. Patte d'oie is a fan with only three jets. 



The Mosaic represents a surface covered with diamond-shaped compartments, 

 formed by two series of parallel lines crossing each other. This effect is produced by 

 placing at each point of intersection, four jets of fire, which run into the adjoining 

 ones. The intervals between the jets must be associated with the discharge of others, 

 so as to keep up a succession of fire in the spaces. 



Cascades imitate sheets or jets of water. The Chinese fire is best adapted to such 

 decorations. 



Fixed stars. The bottom of a rocket is to be stuffed with clay, the vacant space 

 is to be filled with the following composition, and the mouth covered with pasteboard, 

 which must be, pierced into the preparation, with five holes, for the escape of the 

 luminous rays, which represent a star: 



Ordinary Brighter Coloured 



Nitre .... 16 12 



Sulphur .... 4 6 6 



Gunpowder-meal 4 12 16 



Antimony ... 2 1 2 



Lances are long rockets of small diameter, made with cartridge-paper. Those 

 which burn quickest should be the longest. They are composed as follows : 



White lances: nitre, 16 ; sulphur, 8 ; gunpowder, 4 parts. 



Blueish-white lances : nitre, 16 ; sulphur, 8 ; antimony, 4 parts. 



Blue lances: nitre, 16 ; antimony, 8 parts. 



Yellow lances : nitre, 16 ; sulphur, 8 ; gunpowder, 16 ; amber, 8 parts. 



Yellower lances: nitre, 16; sulphur, 4; gunpowder, 16; colophony, 3; amber, 4 

 parts. 



Greenish lances : nitre, 16; sulphur, 6 ; antimony, 6; verdigris, 6 parts. 



Pink lances : nitre, 16; gunpowder, 3; lamp-black, 1. 



Cordage is represented by imbuing soft ropes with a mixture of nitre, 2 ; sulphur, 

 16 ; antimony, 1 ; resin of juniper, 1 part. 



The Bengal flames consist of nitre, 7 ; sulphur, 2 ; antimony, 1. This mixture is 

 pressed strongly into earthen porringers, with some bits of quick-match strewed over 

 the surface. 



Revolving suns are wheels upon whose circumference rockets of different styles are 

 fixed, and which communicate by conduits, so that one is lighted up in succession 

 after another. The composition of their common fire is, for sizes below f of an inch : 

 gunpowder-meal, 6 ; charcoal, not too fine, 3. For larges sizes : gunpowder, 20 ; 

 charcoal, not too fine, 4. For fiery radiations : gunpowder, 16 ; yellow micaceous 

 sand, 2 or 3. For mixed radiations: gunpowder, 16 ; pitcoal, 1 ; yellow sand, 1 or 2. 



The waving or double Catherine wheels, are two suns turning upon the same axis in 

 opposite directions. The fusees are fixed obliquely and not tangentially to their 

 peripheries. The wheel-spokes are charged with a great number of fusees ; two of 

 the four wings revolve in one direction, and the other two in the opposite ; but always 

 in a vertical plane. 



The girandoles, caprices, spirals, and some others have on the contrary a horizontal 

 rotation. The fire-worker may diversify their effects greatly by the arrangement and 

 colour of the jets of flame. Let us take for an example the globe of light. Imagine 

 a large sphere turning freely xrpon its axis, along with a hollow hemisphere, which 

 revolves also upon a vertical axis passing through its under pole. If the two pieces be 

 covered with coloured lances or cordage, a fixed luminous globe will be formed, but 

 if horizontal fusees be added upon the hemisphere, and vertical fusees upon the 

 sphere, the first will have a relative horizontal movement, the second a vertical 

 movement, which, being combined with the first, will cause it to describe a species of 

 curve, whose effect will be an agreeable contrast with the regular movement of the 

 hemisphere. Upon the surface of a revolving sun, smaller suns might be placed, to 

 revolve like statellites round their primaries. 



Ruggieri exhibited a luminous serpent pursuing witli a rapid winding pace a but- 

 terfly which flew continually before it. This extraordinary effect was produced in 

 the following way : Upon the summits of an octagon he fixed eight equal wheels 

 turning freely upon their axles, in the vertical plane of the octagon. An endless 

 chain passed round their circumference, going from the interior to the exterior, cover- 

 ing the outside semi-circumference of the first, the inside of the second, and so in 

 succession ; whence arose the appearance of a great festooned circular line. The 

 chain, like that of a watch, carried upon a portion of its length, a sort of scales 

 pierced with holes for receiving coloured lances, in order to represent a fiery serpent. 

 At a little distance there was a butterfly constructed with white lances. The piece 



