Image: Hotshot furnace Fort Marion (Castillo de San Marcos)
Hotshot_furnace_Fort_Marion_(Castillo_de_San_Marcos).jpg (300 × 267 pixels, file size: 13 KB, MIME type: image/jpeg)
Description: Hotshot furnace at fort Marion (Castillo de San Marcos) used to heat cannonballs
Title: Hotshot furnace Fort Marion (Castillo de San Marcos)
Credit: http://www.cr.nps.gov/history/online_books/regional_review/vol2-2d.htm
Author: United States National Park Service
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
Image usage
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