on display at the Museum of the History of the Brazilian Army at Fort Copacabana, Rio de Janeiro. A 3-pounder 47 mm Hotchkiss revolver cannon was also adopted by the US and Russian navies in the 1880s. This had five barrels. With 3-pounder and 1-pounder weapons, it is difficult to determine from references what type of weapons a particular ship had. Single-shot, revolver cannon, and (from 1890) Maxim-Nordenfelt 1-pounder cannon weapons were all used on new warships from 1880 to 1910. All of these were called quick-firing or, in the US, rapid-firing. Other guns Hotchkiss also produced a range of light naval guns and, in the 1930s, anti-tank guns. The naval guns which originated in the 1880s were mostly 3-pounders and 6-pounders and originally were widely used (by Britain, Russia, and the United States amongst others) for close-up defence of major warships against small craft armed with the newly invented locomotive torpedo. When improvements in torpedo range made them obsolete in this role, they continued to be used as small-craft armament up to and including World War II. In World War I the British motor gunboats which won naval supremacy from the Germans on Lake Tanganyika were armed with the Hotchkiss 3-pounder. The Hotchkiss 6-pounder was adopted by the British army for the first tanks. During World War II the 6-pounder was the main weapon of the early units of the numerous and successful Fairmile D Motor Torpedo Boats of the Royal Navy, not being entirely replaced by more modern weapons until 1945. See also References External links http://www.spanamwar.com/hotchkis165.htm http://www.firstworldwar.com/atoz/mgun_hotchkiss.htm History, description and Animations (Requires QuickTime, and not suitable for slow speed links) Animation showing the inner workings of the revolving cannon Tony DiGiulian, British Hotchkiss 3-pdr (1.4 kg) (1.85"/40 (47 mm)) QF Marks I and II DiGiulian, Tony, US 3-pounders DiGiulian, Tony, Russian Hotchkiss 3-pounders A small 1874 and expanded 1879 brochures by Alfred Koerner Rotary cannon Artillery of France 37 mm artillery 40 mm artillery American frontier Hotchkiss et Cie Artillery of the United States Naval guns of the United States Early machine guns