Mills bomb rifle grenade by attaching a metallic rod to its base. This rod-type rifle-grenade had an effective range of about 150 yards. The operating procedure was to insert the Mills bomb rod down the barrel of a standard rifle, put a special blank cartridge in the rifle's chamber, place the rifle stock on the ground, then pull the Mills bomb's safety pin, releasing the safety spoon and immediately fire the rifle. If the soldier did not launch the grenade quickly, the grenade's fuse would time out and explode. The British soon developed a simple cradle attached to the rifle's bayonet lug
Science and invention in Birmingham so small into the shell of an egg, that the membrane remains intact. This is being developed for use in operations on the inner ear. A project to use fibre optics instead of electric sensors in aircraft fuel tanks is also being undertaken, cutting substantially the risk of sparks setting off an explosion. Science and invention in Birmingham Birmingham is one of England's principal industrial centres and has a history of industrial and scientific innovation. It was once known as 'city of a thousand trades' and in 1791, Arthur Young (the writer and commentator on British economic life) described Birmingham