« It Is not certain just what the terms alang-jabr and muqabalah mean, but the usual interpretation is similar to that implied in the translation above. The word weet-jabr presumably meant something like "restoration" or "completion" and seems to refer to the transposition of subtracted terms to the other side https://daugaard-frazier-3.technetbloggers.de/details-fictie-en-hond-wrapfolie