446 



TRANSACTIONS OF THE 



CHART SHOWING 



GREAT VALLEY OF CALIFORNIA 



AND 



PROFILES OF ITS LENGTH, 



Obstructed and Unobstructed. 



Approximate 1,000 ft. contour. 



Obstructed Profile. 



the weather maps the coincidence of a high barometer over Washington 

 and Oregon was noteworthy at the time of this occurrence. In a paper 

 on "Weather Types on the Pacific Coast," read by me before the California 

 Academy of Sciences, and published in September, 1886, in the " Bulletin," 

 under the head, "North Pacific Cyclonic Type" (republished in the 

 "Annual Meteorological Review of the State of California, for 1886"), I 

 described the conditions under which the north wind occurred. It will 

 thus be seen, that I soon learned the secret of predicting them, and as a 

 matter of fact did so several times successfully; one time in particular, 



