Tidens naturlre fig. Tidens naturlre af Poul la Cour Fig Himlens Bevgelse ved Jordens Nordpol Bogen findes digitalt da Tidens Naturlre Tidens naturlre Nature of time by Poul la Cour Ill Movement of the sky at the north pole The book is digitized at da Tidens Naturlre From the book Tidens naturlre by Poul la Cour Morten Bisgaard