Keywords: Opfindelsernes bog5 fig221.png da Opfindelsernes Bog V 1880 af André Lütken Fig 221 Generator til Siemens' Glassmelteovn <br> en Opfindelsernes Bog V Book of inventions V 1880 by André Lütken Ill 221 From the book Opfindelsernes Bog 1878 by André Lütken 2007-04-24 Morten Bisgaard Author died more than 70 years ago - public domain PD-old Opfindelsernes Bog V |