For this reason, Spanish demicannon were as long as 24 calibers and the quarter-cannon ran up to 28.    From Wordnik.com.  [Artillery Through the Ages A Short Illustrated History of Cannon, Emphasizing Types Used in America] Reference

She carries sixteen pieces of ordinance, two brass rakers, six iron demiculverin drakes, four iron whole culverin drakes, and four iron demicannon drakes.    From Wordnik.com.  [Notes and Queries, Number 07, December 15, 1849] Reference

In St. Domingo about four score, whereof was very much great ordnance, as whole cannon, 10 demicannon, culverins, and such like.    From Wordnik.com.  [Drake’s Great Armada] Reference

The Bridgeward heard, and muttered, “A plague on falcon and falconet, on cannon and demicannon, and all the barking bull-dogs whom they halloo against stone and lime in these our days!.    From Wordnik.com.  [The Abbot] Reference