Jeff Wisnia writes:

Thus, a pile of cannonballs and a rack say 4 feet on a side dropping
in temperature from say 70 F to -20 F would have an overall
differential length change of

4 * 12 * 4e-6 * 90 = 0.017"

How much movement would a pile of "one deep" have? :-)

Cannon shot was not stored in piles, but in "shot garlands" which
were planks with a row of holes.

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