The above _general_ enunciations of the barometric and anemonal phaenomena of a rotating storm hold good with regard to the _northern_ hemisphere, whatever may be the direction in which the hurricanes advance. This may be placed in a clearer light, as well as the remaining classes of phaenomena shown, by consulting the following tables, constructed for the basin of the Northern Atlantic, and comparing them with fig. 1. In this basin, with lower latitudes than 25 deg., the usual paths of the hurricanes are towards the north-west, in higher latitudes than 30 deg. towards the north-east. The tables exhibit the veering of the wind with the movements of the barometer, according as the ship is situated in the right or left hand semicircle of the hurricane. It must here be understood that the right and left hand semicircles are determined by the observer so placing himself that his face is directed towards the quarter to which the hurricane is advancing. LOWER LATITUDES. NORTHERN HEMISPHERE. Axis line, wind N.E., barometer falling, first half of storm. Axis line, wind S.W., barometer rising, last half of storm. RIGHT-HAND SEMICIRCLE. Wind E.N.E., E., E.S.E., S.E., barometer falling, storm increasing. Wind S.S.W., S., S.S.E., S.E., barometer rising, storm passing off. LEFT-HAND SEMICIRCLE. Wind N.N.E., N., N.N.W., N.W., barometer falling, storm increasing. Wind W.S.W., W., W.N.W., N.W., barometer rising, storm passing off. HIGHER LATITUDES. NORTHERN HEMISPHERE.[2] Axis line, wind S.E., barometer falling, first half of storm. Axis line, wind N.W., barometer rising, last half of storm. 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. [Illustration: Fig. 2] CHAPTER II. PHAENOMENA OF ATMOSPHERIC WAVES.