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"The Chilean Saltpeter Works Are Unique In The World. No Other Rich Seams Of Saltpeter Are Known To Exist And Nowhere Else Has A Saltpeter Industry Developed Of The Same Scope And Scale" (Ab Ev)
Chilehaus Was Built For Henry Brarens Sloman (1848-1931). He Made His Fortune In Chile In Saltpeter Mining. On Returning To Hamburg He Commissioned The "Chilehaus" Naming It After The Source Of His Wealth
"Saltpetre Deposits Were Discovered On The Cave Walls And This Valuable Nitrate Was Removed And Sent To Be Processed In Gunpowder Factories Between 1809 And 1819." (Ab Eval)
"Rjukan Was Formerly A Significant Industrial Centre In Telemark, And The Town Was Established Between 1905 And 1916, When Norsk Hydro Started Saltpetre (Fertilizer) Production There. " (Wiki)
"Making Saltpeter, An Ingredient In Gunpowder, Was An Important Industry For The Region During The Edo Period." There's A Saltpeter Museum In Suganuma Village
See Www.Japan-Guide.Com
See Www.Japan-Guide.Com
It Is Believed That The Amphitheatre Was Used As A Saltpetre Manufacture In The End Of The 18th And In The 19th Century. (Wiki)