Statistics for occurrence #1 of “William Denning” in entry cannon of Harper's Encyclopedia of United States History:
...gewater, 1648.
In 1735 the Hope Furnace was established in Rhode Island, where six heavy cannon, ordered by the State, were cast in 1775.
The heaviest guns used at this time were 18-pounders.
William Denning makes wrought-iron cannon of staves bound together with wrought-iron bands, and boxed and breeched, 1790.
Colonel Bomford, of the United States ordnance department, invents a cannon called the co...
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