An animation showing the mechanism of the Hotchkiss 37mm Revolving cannon of 1884. This was used extensively by France, other European nations and the United States as an anti-torpedo boat gun. It was also used extensively on land against troops. It fired an explosive shell of approximately 1 lb. (450 gms) to a range of 4,000 yards. Peak firing rate 60-80 rounds a minute, or 15 aimed rounds per minute. Shown on a Naval Mount. No commentary.