«At the turn of the century, Friedrich Hultsch in the summation of his lifelong research on ancient measures, concluded that all weights of the ancient world may be calculated by a unit of 9 grams which I call basic sheqel, but he called by its Egyptian name of qedet. Hultsch, however, could not determine exactly the value of the basic sheqel and chose values that waver between 9.0 and 9.1125 grams», come si legge nel sito sulla storia della metrica «Metrum».
