Science and invention in Birmingham pen nibs per week. 1915: William Mills develops the first "safe grenade" meaning it is safe for the soldier throwing it rather than his opponent. It is named the Mills bomb, and is adopted by the British Army as its standard hand grenade in 1915. 75,000,000 grenades are supplied during The Great War. 1918: Much work is carried out by Oliver Lucas's company on the design and improvement of the military search light, he also designs a signalling lamp after experiences at the Somme and the design is later used by the British Army. 1920: Charles Henry Foyle invents the
Telephone numbers in Australia Code" and then the specific "Local" number). In major centres, the first four digits specify the CCA (Call Collection Area, also known as an "exchange"), and the remaining digits specify a number at that exchange, up to 10,000 of which may be connected. Smaller Exchanges in more remote areas may be specified by five or six "local" digits, meaning that no more than 1,000 or 100 numbers respectively could be connected to such exchanges. To access numbers in the same area, it is necessary only to dial the eight digits concerned. To access a number in another "Area" it is