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 Ghana Telephone numbers in Ghana The Ghana telephone numbering plan is the system used for assigning telephone numbers in Ghana. It is regulated by the National Communications Authority, which holds responsibility for telecommunications. Since 1 May 2010, all fixed-line numbers and mobile numbers have 9 national (significant) numbers after the '0' trunk code. Due to the unreliability of fixed-line infrastructure in Ghana, mobile phones are more widely used. Competition among the various mobile carriers has spurred growth with a subscriber penetration rate of 98% in 2010. The poor call quality of mobile phones, however, means that more people hold more than