File:Mining and Scientific Press - 1883-06-02 - Hercules Powder.jpg
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![File:Mining and Scientific Press - 1883-06-02 - Hercules Powder.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/2/2f/Mining_and_Scientific_Press_-_1883-06-02_-_Hercules_Powder.jpg/444px-Mining_and_Scientific_Press_-_1883-06-02_-_Hercules_Powder.jpg?20130222165103)
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