This post will be important. A lot of Medieval Middle Eastern recipes do not have measurements, those that do have period measurements. Here is a listing with modern conversions.
1 lb (Ratl) = 400 g
1 ounce (uqiya) = 3.3 grams
1 dinar = 4.25 grams
1 dirham = 3 grams
1 rub (a quarter of a measure called qadah = 23.5 deciliters or about 1 measuring cup (American)
1 danaq = .5 grams
(Perry, pp. 22)
These are the measurements used for making mead when measuring out the spices. Ok roughly. I used the American grams that measured more in the 3 gram ranger then then 4.25 gram range.