Fig. 4From: New insights into the materials of fifteenth- and sixteenth-century Netherlandish paintings in the National Gallery, London a Joachim Beuckelaer, The Four Elements: Air (NG6587), 1570, detail showing the woman at the left; b Joachim Beuckelaer, The Four Elements: Fire (NG6588), 1570, detail showing the woman at the left. Images © National Gallery, LondonBack to article page