Pyrotechnics - The History and Art of Firework Making, Part 1
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Pyrotechnic Compositions and Gunpowder
In Siam it is a custom and one apparently of considerable antiquity to celebrate certain religious festivals with firework displays. The composition consists of coarse native powder, of which from 20 pounds to 30 pounds is often used in one case. A rough scaffold is erected from which to fire the rockets; according to those who have witnessed such exhibitions, considerable altitudes are reached by the rockets in flight.
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