The First World War: Hydro was taking no chances in the event of hostilities and set up anti-aircraft guns to protect its factories. 1914: War and difficult decisions @(margin ? "h2" : "h3")>
Notodden. A town takes shape. The year is 1911. Notodden will soon be home to 10,000 people but is not given town status for another two years. 1908: Of course the workers must have houses @(margin ? "h2" : "h3")>
Rjukan in 1916. The change from rural community to industrial society was rapid. 1906: The next gigantic step @(margin ? "h2" : "h3")>
King Haakon arrives with Crown Prince Olav on this arm, and is welcomed to Norway by the prime minister, Christian Michelsen. Norsk Hydro was founded the following week. 1905: A little bit of Norway and more @(margin ? "h2" : "h3")>
Hydro was established by Swedish and French capital, but later Prime Minister Gunnar Knudsen (left) was a key player, here with general director Sam Eyde. 1905: A new working day – December 2, 1905 @(margin ? "h2" : "h3")>
Factory buildings at Notodden (1907). Further construction work was carried out at Notodden when it became clear in the autumn of 1905 that the time was not yet right for the major industrial development of Rjukan. 1904: A project of caliber @(margin ? "h2" : "h3")>
The electric cannon Birkeland used in his demonstrations 1903: Explosive winter days @(margin ? "h2" : "h3")>