Of all these grains barley is the lightest,123 its weight rarely exceeding fifteen pounds to the modius, while that of the bean is twenty-two. Spelt is much heavier than barley, and wheat heavier than spelt. In Egypt they make a meal124 of olyra,125 a third variety of corn that grows there. The Gauls have also a kind of spelt peculiar to that country: they give it the name of “brace,”126 while to us it is known as “sandala:” it has a grain of remarkable whiteness. Another difference, again, is the fact that it yields nearly four pounds more of bread to the modius than any other kind of spelt. Verrius states that for three hundred years the Romans made use of no other meal than that of corn.