File:武经总要前集卷十二霹雳火球制法.jpg

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Summary

Description	English: Instruction for making fire cracker ball
Date	1044
Source	Wujing Zongyao 武经总要
Author	曾公亮 11th century

Licensing

	This work is in the public domain* in the United States, and those countries with a copyright term of life of the author plus 100 years or less.*
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

File usage

The following pages on Schools Wikipedia link to this image (list may be incomplete):

Gunpowder

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Author	Picasa
Software used	Picasa
Exif version	2.2
Unique image ID	dfb1f7b367c4992b8e30d418855ef18a

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