Figures
     Figure 1 : Conversion  to Islam in al-Andalus
     Figure 2 : Typology  of Christian and Muslim Enclaves in Medieval Spain 
     Figure 3 : Components  of an Animal-drawn Noria
     Figure 4 :  Maslama and his School
     Figure 5 : The Andalusi  Agronomical School
     Figure 6 : Ratio  of Christian and Muslim Scientists
     Figure 7 : Comparative Conversion Curve