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
Lotteries in Australia 1245), Lucky Keno was changed to a 20-from-80 game drawn once a day, with a fixed A$2 million prize for Spot 10/Match 10 – matching the previous maximum jackpot prize of its predecessor, Tatts Keno. Wagers can be made with between 3 and 10 "spotted" numbers. As "Lucky Keno 70", a "Hi-Lo" bet was also available, which won if 13 or more numbers fell on the correctly predicted half of the available balls (Low: numbers 1–35; High: numbers 36–70). The bonus wager and the Hi-Lo game is no longer available since 15 March 2010. The Australian Soccer Pools (usually branded