TECHNOLOGIC INNOVATIONS By gabbalo46 1592 Thermometer 1709 Blast furnace 1742 Celsius scale 1824 Thermodynamics 1827 Turbine 1830 Thermostat 1843 Pressure gauge 1852 Heat pumps 1854 Internal combustion engine 1863 Wankel petrol engine 1882 Water heater/Boiler 1884 Steam turbine 1894 Hydroelectric power plant 1897 Diesel engine 1904 Safety valve 1905 Photovoltaic cells, photovoltaic energy and photovoltaic panels 1942 Nuclear reactor 1954 Nuclear power plant 1954 Photovoltaic solar battery 1971 Calculator