29 



APRIL 10 TO APRIL 22, 1931 



Maximum air temperature, 40° F. 



Minimum air temperature, 26° F. 



Mean air temperature, 33.5° F. 



Visibility was less than 4 miles, 21.1 per cent of the time. 



Visibility was less than 2 miles, 10.9 per cent of the time. 



Figure 15 shows the meteorological graph. 



Figure 23 shows the track of the vessel. 



Figure 16. — Weather diagram, third cruise 



MAY 2 TO MAY 16, 1931 



Maximum air temperature, 47° F. 

 Minimum air temperature, 28° F. 

 Mean air temperature, 37° F. 



Visibility was less than 4 miles, 33.6 per cent of the time. 

 Visibility was less than 2 miles, 18.1 per cent of the time. 

 Figure 16 shows the meteorological graph. 

 Figure 24 shows the track of the vessel. 

 110911—32 3 



