Direction of the Winds.
“The rose of the winds, divided into 360 deg., will give a clearer idea of what has been here said; it being well understood that the pilot must place the center of the winds on the point from which he starts, or from which he takes the course, and he must fix the pole to the true pole observed from the sun, and not trusting to the compass, which north-easts or north-wests.”
“Then, to ascertain whence comes the wind, place a little stick with a little sail[436] in the centre of your rose or circle of winds, divided into 360 deg., and placed in such a manner that north and south stand on the true Solar meridian. The direction of the vane moved by the wind will indicate exactly which wind blows: on the equinoctial is east and west; at 45 deg. there is north-east, south-west, north-west, and south-east; at 221⁄2 deg. towards north you have north-north-east, and so on with the others.”