Four, viz.: Guns, Howitzers, Columbiads, and Mortars.
3. How are these pieces distinguished?
According to their use as Sea-coast, Garrison, Siege, and Field Artillery.
4. What metals are used in the construction of Artillery?
All heavy artillery, such as that for sea-coast, siege, and garrison equipment, is made of iron; and that for field service, of bronze.
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5. What is bronze for cannon?
An ALLOY consisting of 90 parts of copper and 10 of tin, allowing a variation of one part of tin more or less. It is commonly called brass.
6. Why is bronze used in preference to iron, for field pieces?
This metal, having greater tenacity and strength than iron, the pieces can be made lighter.