        “I don’t do much cooking,” Twilight muttered.  “But you’re right.  I think those systems are Pegos in origin.  Dry weights are Equuis, and grains is a unicorn adaptation of the Draconic system.  I seem to remember the Griffons used a different system—Rainbow Dash would know—a lot of the weather notation comes from Griffon.  I think they use ropes or cables or something for distance.  But those are just units; they still use the same base.”