1751
% complete
https://www.biography.com/.image/t_share/MTE1ODA0OTcxNjMyNzg5MDA1/benjamin-franklin-9301234-2-402.jpg
http://www.americaslibrary.gov/aa/franklinb/aa_franklinb_electric_2.html
1802
http://spartacus-educational.com/SCdavy.jpg
https://www.bulbs.com/learning/history.aspx
1839
http://www.virtualmuseum.ca/media/edu/EN/uploads/image/LO11DA35798174058001804684.jpg https://www.energymatters.com.au/panels-modules/
1849
https://upload.wikimedia.org/wikipedia/commons/thumb/2/2f/James_Bicheno_Francis.png/150px-James_Bicheno_Francis.png
https://www.hydropower.org/a-brief-history-of-hydropower
1888
https://upload.wikimedia.org/wikipedia/commons/4/4d/Charles_F._Brush_ca1920.jpg
http://www.thirdplanetwind.com/energy/history.aspx
1935
http://www.history.com/s3static/video-thumbnails/AETN-History_VMS/21/154/History_Kaiser_Builds_Hoover_Dam_and_Warships_45407_SF_HD_1104x622-16x9.jpg
http://www.history.com/topics/hoover-dam
1941
http://ethw.org/w/images/8/82/Ohl.jpg
https://www.energymatters.com.au/panels-modules/
1951
https://www.worldatlas.com/r/w728-h425-c728x425/upload/5a/ff/4c/shutterstock-588385358.jpg
https://www.euronuclear.org/info/encyclopedia/n/nuclear-power-plant-world-wide.htm
1954
http://weekly.ahram.org.eg/Media/NewsMedia/2015/2/17/2015-635598030713120322-312_resized.jpg
2009
https://static01.nyt.com/images/2011/05/20/world/20gorges_337_span/20gorges-jumbo.jpg
https://science.howstuffworks.com/environmental/green-science/three-gorges-dam-disaster.htm