OF EQUINOCTIAL STORMS. 13 



both with the solar tide, and occur as the annual 

 tide crosses the equator, that is, when it is half-way 

 between the extremes of its oscillation. But the 

 equinoctial conflicts occur at the turning points of the 

 annual tide, that is, when it commences to fall from 

 its extreme culmination; and, in the northern hemi- 

 sphere, comes into conflict with the counter-solar tide 

 in September, and, in the southern hemisphere, comes 

 into conflict with the solar tide in March. 



Thus these conflicts occur in the northern hemi- 

 sphere at the time of the September equinox and at 

 the time of the June solstice; and in the southern 

 hemisphere they occur at the time of the March 

 equinox and at the time of the December solstice. 



173. In these conflicts, as the axial rotation of the 

 earth causes the tides setting from the equator to 

 tend eastwards, and those setting towards the equator 

 to tend westwards, they form at the points of conflict 

 revolving fragments whose eastern sides whirl from 

 the equator and western sides towards the equator. 

 The opposing forces thus whirl in conflict as they 

 cross, and then pass onwards each upon its course. 



174. Oceanic conflicts of this nature have not been 

 subjects of practical investigation. But their atmo- 

 spheric counterparts are clearly such as the able in- 

 vestigations of Reid, Piddington, Dove, and others, 

 have shown to be the nature of such storms as 

 are known under the various names of Hurricanes, 

 Cyclones or Typhoons. These storms form a matter 



