AT ORMOND BY THE SEA. 49 



frail an insect to have covered. But the various 

 species of Cassia, or wild senna, on the foliage of 

 which the larvae feed, occur over the same range, 

 and so have rendered possible the spread of the in- 

 sect. 



In the vicinity of Ormond artesian sulphur water 

 is obtained at a depth of 150 feet ; rising four to six 

 feet above the surface when the vein is tapped. But 

 few springs or shallow wells are found, cistern water 

 being mostly used where the artesian bores have not 

 been sunk. 



March 12, 1899. Three days ago I wore an over- 

 coat, heavy winter underwear, and sought the sun. 

 To-dav I am dressed in thinnest garb at my command 

 and seek the shade. Such is the change wrought in 

 the temperature of the air about me by the unequal 

 heating of certain portions of the atmosphere sur- 

 rounding this earth of ours and a consequent shift- 

 ing of those portions. Three days ago great vol- 

 umes of cool air came rushing down from the north. 

 To-day they are replaced by other volumes rushing 

 up from the south. Too few people realize that a 

 change in temperature is but a change in that por- 

 tion of the atmospheric ocean which surrounds them ; 

 great waves of cold air from another part of that 

 ocean descending and pushing out the warm, or ris- 

 ing into other regions to fill a vacuum, and allowing 

 waves of warm air to take their place. 



