In 459 an attack by Corinth, which had always coveted Megara's territory, induced the people to summon the aid of the Athenians, who secured Megara in battle and by the construction of long walls between the capital and its port Nisaea.
It occupies the site of the ancient Menaenum, founded by Ducetius in 459 B.C. There is some doubt as to whether this town was also the birthplace of Ducetius, owing to confusions in nomenclature (see E.
On page 459 of the Memoire will be found a list of previous careful experiments on the velocity of sound.
The Liber abaci, which fills 459 printed pages, contains the most perfect methods of calculating with whole numbers and with fractions, practice, extraction of the square and cube roots, proportion, chain rule, finding of proportional parts, averages, progressions, even compound interest, just as in the completest mercantile arithmetics of our days.