Note 46 — VII THE MUHAMMADAN DYNASTIES OF DEHLĪ
Reading edition
The variation is due to the fact that silver and copper only form a homogeneous alloy when mixed in the ratio of 71·89 of the former to 28·11 of the latter. This fact was certainly unknown at this period. Cf. J.A.S.B., N.S., XXXV, p. 22, “The Currency of the Pathan Sultans,” by H. R. Nevill.