Robertsholm station före namnbytet till Hofors. Framför stationshuset syns Gävle-Dala Järnvägs ånglok GDJ lok 4 "Norden", samt stationskarl Olof Wallström, född 1836, död 26/6 1884. Anställd 1/5 1861.
Railway stations in Sweden
Steam Machines, Engines, Locomotives. In 1781 James Watt patented a steam engine that produced continuous rotary motion. Watt's ten-horsepower engines enabled a wide range of manufacturing machinery to be powered. The engines could be sited anywhere that water and coal or wood fuel could be obtained. By 1883, engines that could provide 10,000 hp had become feasible. The steam engine was one of the most important technologies of the Industrial Revolution.