tendency of the lines which separate the different regions
of the winds. Thus will their force be broken and turned
away from the houses and public ways; for if the directions -
of the streets be parallel to those of the winds,
the latter will rush through them with greater violence,
since from occupying the whole space of the surrounding
country they will be forced up through a narrow pass.
Streets or public ways ought therefore to be so set out,
that when the winds blow hard their violence may be
broken against the angles of the different divisions of the
city, and thus dissipated. Those who are accustomed to
the names of so many winds, will perhaps be surprised at
our division of them into eight only; but if they reflect that
the cirçuit of the earth was ascertained by Eratosthenes of
Cyrene, from mathematical calculations, founded on the
sun's course, the shadow of an equinoctial gnomon, and the
obliquity of the heavens, and was discovered to be equal
to two hundred and fifty-two thousand stadia or thirty-one
millions and five hundred thousand paces, an eighth part
whereof, as occupied by each wind, being three millions
nine hundred and thirty-seven thousand five hundred
paces, their surprise will cease, because of the number
of impediments and reverberations it must naturally
be subject to in travelling such distance through such
varied space. To the right and left of the south wind blow
respectively Euronotus and Altanus. On the sides of Africus, -
the south-west wind, Libonotus southward and
Subvesperus northward. On the southern side of Favonius, -
the west wind, Argestes, and on its northern side
Etesiæ. On the western side of Caurus, the north-west
wind, Circius, on its northern side Corus. On the western -
and eastern sides respectively of Septentrio, the nörth
