Thursday, May 23, 2013

Slovakia 10 euro 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)

1 comment: