-1859] WRITINGS OF JOSEPH HENRY. 79 



northwest, and in the summer from the southwest. In 

 Oregon and Washington Territories the greatest amount of 



No. 3. 



Oregon and Washington Terrltoi'ies. Nebraska and Kansas Territories. 

 Summer. "Winter. Summer. Winter. 



•wind in the winter is from the southeast, and the next 

 greatest from the northwest, these two principally dividing 

 the season between them. In summer a very large propor- 

 tion is from the northwest, which is a remarkable inversion 

 of the winds as observed in other parts of the United States. 

 The principal current in winter being in the direction of 

 the coast, from the southeast, consequently tends to mitigate 

 the cold; while in summer it is in the opposite direction, 

 and therefore tends to produce a similar effect in diminish- 

 ing the intensity of the heat. 



No. 4. 



Texas and New Mexico. S. C, Ga., Ala., Miss. 



Summer. "Winter. Summer. "Winter. 



In No. 4 the two circles to the right exhibit the general dir- 

 ection of the wind in South Carolina, Georgia, Alabama, and 

 Mississippi ; and those on the left, in Texas and New Mexico. 

 In the former the winds in winter nearly equally divide the 

 ■whole circumference of the horizon; in summer the south 

 and southeast winds prevail. In Texas and New Mexico 

 the wind in the winter is largely from the north, and often 



