WHOLE VOL. NOTES. NORTH AMERICA 37 



NORTH AMERICA 



ALASKA 



Authority. 



United States Weather Bureau, Washington, D. C. 



The pressure data for the Alaskan stations have not heen reduced 



to 24-hour values, as corrections have not been determined. 

 Removals of the stations have occurred, but details are not 



available. The pressures have been corrected to the heights 



given in the tables. 



BARROW 



Pressure. 



The height of the barometer above sea level has been varied. 

 The first elevation given was about 20 ft. in August 1921. 

 Elevation ranged between 30 and 19 ft. from September 

 1921 to July 1923. From September 1928 to December 1930 

 the elevation was 15 ft. The readings of the barometer 

 have been reduced to sea level throughout the period. 

 Time. 



Observations were taken at 7 11 and 19 11 , 150th meridian W. for 

 1921-1923, at 8 h and 20' 1 from September 1928 to July 1930 

 inclusive, and at 2 h and 14 11 from August to December 1930. 

 Earlier Data. 



The observations before 1921 were very broken, but such data 

 as exist are given in a special table in part III. 



DUTCH HARBOR 



Hours of observation: Noon and midnight, 165th meridian, 1921 ; 

 6 h and i8 h , 165th meridian, 1922 to 1926, except 5 h to 6 h and iy h to 

 i8 h in 1924; 6 h and i8 h , 165th meridian, 1927, except 2 h and I4 h 

 June to December; 2 h and i4 h , 165th meridian, 1928, except i h and 

 I3 h , July to September; i h and 13 11 , 165th meridian, or 4 h and i6\ 

 1 20th meridian, 1929 and 1930. 



EAGLE 



Hours of observation: 8 h and i8 h , 135th meridian, 1921 ; 8 h and 

 i9 h , 135th meridian, 1922; 8 h and i6 h to 20 h , 135th meridian, 1923; 

 8 h and 20 h , 135th meridian, 1924 to 1929; 8 h and 20 h , 135th meridian, 

 1930, except 3 h and i5 h August to December. 



