Modum Promissionis

Your correspondent C. H. has not solved my difficulty as to *modum promissionis*. In the hope that he, or others, will still kindly endeavour to do so, I subjoin the context in which it stands:— "Noluit Jethro legem posteris figere: sed, quoad quietam stationem adeptus esset populus, remedium præsentibus incommodis, atque (ut vulgo loquitur) modum promissionis ostendit." An old French translation renders it:— "Il n'a point donc voulu mettre loy pour la posterité: mais seulement remedier aux incommoditez presentes *par maniére de provision* (comme on dit)," &c. The general import of the passage…