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Keywords: Tidens naturlære fig23.png Tidens naturlære 1903 af Poul la Cour Fig 23 Viserværk <br> Bogen findes digitalt på s da Tidens Naturlære Drawing of the 'motion work' of a clock the gears that turn the hour and minute hands From Tidens naturlære Nature of time 1903 by Poul la Cour Fig 23 The book is digitized at s da Tidens Naturlære From the book Tidens naturlære 1903 by Poul la Cour 2006-08-07 Morten Bisgaard PD-Old PD-old Tidens naturlære Motion work Old horology prints |