Fig. 2From: The role of visual representations in scientific practices: from conceptual understanding and knowledge generation to ‘seeing’ how science works a Iron filing pattern in case of bar magnet drawn by Faraday (Faraday 1852b, Plate IX, p. 158, Fig. 1), b Faraday’s drawing of lines of magnetic force in case of cylinder magnet, where the experimental procedure, knife blade showing the direction of lines, is combined into drawing (Faraday, 1855, vol. 1, plate 1)Back to article page