80 



WRITINGS OF JOSEPH HENRY. 



[1855- 



from the south ; in summer its preponderance is greatly in 

 favor of the south. 



No. 5. 



Lower California. 



Summer. 



"Winter. 



No. 5 exhibits the winds of Lower California, which in 

 winter are from all parts of the horizon ; those from the- 

 north and west however preponderating. In summer it is 

 almost entirely from the southwest. 



The winds thus represented are surface currents, and are 

 consequently much influenced by the position of mountain 

 ranges. This is strikingly shown in No 6, which represents 

 the mean annual wind at Hudson, Albany, and Utica, in. 

 the State of New York. 



Hudso7i, N. Y. 

 8 vars. 



No. 6. 



Albany, N. Y. 

 12 years. 



Utica, N. Y. 

 12 years. 



Hudson is in the valley of the Hudson river, a long, nar- 

 row glen extending in a north and south direction ; and as 

 the figure indicates, the winds are principally confined to 

 the same course, blowing down the glen to the south in 

 winter, and in the opposite direction in the summer. Albany 

 is situated at the junction of the wide Mohawk valley with 

 that of the Hudson, and the wind accordingly is from the 

 northwest and from the south. Utica is in the valley of the 

 Mohawk, which has a general east and west direction, the 



