470 



WRITINGS OF JOSEPH HENRY. 



[1875 



New Landort'. J 



\ JBcfrUett V Beef MrT. 



<|y 



Fisher^Id. 



» 



JSare Bock. 



(^ 



^LimefhMId.LJO. 



Flam Id. 



Gar din err b _Sl^ 

 Island L.M^ 



Jjiille Gull Island and' 

 Vicinity. 



Scale of Miles. 



Fig. G. 



the heat of the sun increases during the first part of the day, 

 the temperature of the land rises above that of the sea; and 

 this excess of temperature produces upward currents of air, 



