Being a very-simplest introduction to those beautiful methods which are generally called by the terrifying names of the Differential Calculus and the Integral Calculus
Kaus Borealis, the Northern (part of the) Bow, was Al Tizini’s Rai al Na’aim, the Keeper of the Na’ams, the uncertainty as to the meaning of which has already been noticed; but Kazwini evidently understood by it Ostriches, for in his list it is, with the stars μ, Al Thalimain, plainly meaning these desert birds.