13. Northern Hemisphere of Globe by Mohammed ben Helal,
1275. _From Dorn's reproduction of original in London
Asiatic Society's collection_ 28
14. Globe of Mohammed ben Muwajed el Ordhi, 1279. _From
original in Math. Phys. Salon, Dresden_ 30
15. Globe of Diemat Eddin Mohammed, 1573. _From original
in National Library, Paris_ 32
15a. Anonymous Arabic Globe, 1635. _From original in Library
Professor David E. Smith, New York_ 34