Thursday, May 23, 2013

Slovakia 10 euros 2013 - Jozef Karol Hell

New silver commemorative:

"Birth tricentenary of Jozef Karol Hell"

Jozef Karol Hell was a mining engineer, who invented the water-pillar (water pump machine) in 1749 (first use 1753). It is mainly used today for oil extraction.



(news by Pabitra Saha)
(biographical data from Wikipedia)

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