Anti-aircraft guns

are guns so mounted that they may be pointed upward to fire directly against objects in the air. During the European War these guns, fitted with special appliances and ammunition, were used for defence against air-raids of the enemy, against Zeppelins and Gothas. The anti-aircraft guns are of various types, ranging from light machine-guns up to batteries of 3-inch and 6-inch guns. Some of them have brought down enemy machines flying at a height of 10,000 or 12,000 feet.