Statistics for occurrence #1 of “Major Wade” in entry cannon of Harper's Encyclopedia of United States History:

...rd; weight, 14,500 lbs.; shot, 130 lbs.; shell, 90 lbs.; charge of powder, 18 lbs., Sept. 6, 1839. Character of gun iron definitely fixed by the metallo-dynamoter, a testing-machine invented by Major Wade , 1840. First 12-in. columbiad; weight, 25,510 lbs.; extreme range, 5,761 yds.; weight of shell, 172 lbs.; charge of powder, 20 lbs.; cast at the South Boston foundry, July 8, 1846. Dahlgren...
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