RIGHT-HAND SEMICIRCLE.
Wind S.S.E., S., S.S.W., S.W., barometer falling, storm increasing.
Wind W.N.W., W., W.S.W., S.W., barometer rising, storm passing off.
LEFT-HAND SEMICIRCLE.
Wind E.S.E., E., E.N.E., N.E., barometer falling, storm increasing.
Wind N.N.W., N., N.N.E., N.E., barometer rising, storm passing off.
N.B. The directions of the hurricane winds are so arranged as to show the points of commencement and termination. Thus in the lower latitudes a storm commencing at E.N.E. passes off at S.S.W. after the wind has veered E., E.S.E., S.E., S.S.E., and S., being in the order of the letters in the upper line and contrary to their order in the lower. One commencing at E.S.E. passes off at S.S.E. right-hand semicircle. In the higher latitudes a ship taking the storm at E.N.E. will be in the left-hand semicircle, and the hurricane will pass off at N.N.E. These changes are rendered very apparent by moving the hurricane circle in the direction in which the storm is expected to proceed.
Fig. 2 represents the whirl and hurricane winds in the south.
