nationaalarchief

347 photos tagged nationaalarchief, from 1 member of Flickr Commons.

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84
2009
2010

 

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Hoogheemraadschap Zeeburg en Diemerdijk

Hellend scheprad / Angled paddle wheel

  • remaha1957 said:
    De uitvinding werd getest in droogmakerij Bleiswijk in 1775-1776. Er werd een jaar lang met 4 molens , 2 standaard scheprad en 2 met hellend rad, meer dan 160 proeven gedaan , de uitkomst was licht in het voordeel van hellend scheprad . De proeven werden beschreven door wiskundige B.J.Douwes zie books.google.nl/books In de Bataafs-Franse tijd is er opnieuw belangstelling voor dit ontwerp, zie archief inspecteurs van Waterstaat 2.16.06 inv. nr 690 Nationaal Archief . web2ontdekker 23archiefdingen

Bobsleeën, vijfmansbob / Bobsleigh

  • 13 older comments, and then…
  • Berend Stettler said:
    wow, amazing shot... 1931.... unbelievable....
  • urbanworkbench said:
    Modern day equivalent in Rossland BC, 2010 at the 113th Annual Winter Carnival.
  • Michael Barry said:
    amazing to freeze this moment, considering the technology.
  • Blue Mountains Library, Local Studies said:
    Wonderful photo!
  • astoria4u said:
    Hi, I'm an admin for a group called Photos of Merit, and we'd love to have this added to the group!