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
Interstate 70 in West Virginia from the old National Road and US 40. The first portion of what is now known as I-70 to be completed across West Virginia was the Fort Henry Bridge across the main channel of the Ohio River, built in 1955. WVDOT began obtaining right-of-way for I-70 in 1961. The Wheeling Tunnel, linking downtown Wheeling and the Fort Henry Bridge to the eastern suburb of Elm Grove, was completed in 1967 at a cost of $7 million (equivalent to $ in ). The bridge that carries I-70 from the Ohio state line onto Wheeling Island was completed in 1968. Construction of