132 Dr. Cutbush on the Chinese Fin, se. 
Besides the admixture of several saline substances, 
which communicate particular colours to flame, we know 
that the most brilliant red is given to flame by nitrate of 
strontian. A preparation in which it is used for theatrical 
purposes in France, is made as follows: take forty parts 
of dry nitrate of strontian, thirteen parts of finely powder- 
ed sulphur, five parts of chlorate or hyperoxymuriate of — 
potash, and four parts of sulphuret of antimony, and mix 
them intimately in a mortar, observing at the same time to 
pulverize the chlorate of potash, separately. A little sul- 
phuret of arsenic is sometimes added, and if the fire should 
burn dim, a small quantity of pulverized charcoal is added. 
The portable fire works made in miniature, and exhibited 
in rooms or close apartments, are much of the same na- 
ture as already described. Another description of fire - 
works are made to communicate an agreeable odour, hence 
called scented fires. Vases of scent were greatly employ- 
ed in the public feasts and ceremonies at Rome, Athens, 
and particularly in Egypt. The vessels which contained 
the composition, were placed by the Athenians in sculp- 
tured vases. We know but little respecting the compo- 
sitions they used. Myrrh and frankincense were the mos 
common, as well as the most prominent articles. It will 
be suflicient to notice two modern preparations of this 
kind. The pastilles or fire crayons, calculated for this 
purpose, are conical troches, which are set on fire upon a 
plate. They are made up o 
Storax Calamit. - - - 2 oz. 
Benzoin, = - . + - oi}, Oly 
um Jupiper, - : - - 2 oz, 
Oli - ‘ - e, fiom 
Mastic, - banlimie a. - 1 oz. 
Frankincense, | - - . =o Sh Ome 
Amber, - . . no} Halk 1 oz. 
Camphor,  - ohi a) oy ft sebherts aah gol OMe 
Salt-petre, - - - - 3 oz. 
illow charcoal, - - - 402. 
In the Dictionnaire de? Industrie is a composition for the 
same purpose, called the odoriferous paste; it is nearly the 
same as above, but contains cascarilla, cloves, oil of lemon 
and tincture ofamber. In the Archives des Decowvertes, iit- 
