FSTC Chairman at Uniday, Germany
Part of page 2 of Al-Razi's book on diet therapy Manafi' al-Aghdhiyah wa-Daf' Madharriha with added underlining to highlight relevant text.
Figure 1: A line sketch depicting Al-Biruni in a Turkish stamp. The stamp reads: "Ebû Reyhan El-Bîrûnî 973-1059".
Figure 1: View of primary and secondary rainbows (Source).