puted that the top of the photograph represented a distance 15 miles 

 from the plane's track, while the bottom of the picture represented 

 a distance of about 1 to 2 miles from the plane's track, depending 

 on the height at which the picture was taken, usually at 6,000 or 

 10,000 feet. Thus it was possible to count the icebergs in each square 

 mile and, further, to match consecutive photographs with each other 

 so that there would not be any duplication. 



There were nine flights made between 10 August 1919 and 18 

 August 1949. A tabulation of tlie flights is as follows (letter designa- 

 tions refer to the letters on figure 7) : 



A chart of the Baffin Bay area is shown in figure 8 which indicates 

 the distribution of the icebergs for the 1919 census. Figures 9, 10, 

 and 11 illustrate the distribution in greater detail. Baffin Bay was 

 divided into three areas. A, B, and C, whose boundaries were chosen 

 after a study of current conditions in this area. In area A there 

 were 33,962 icebergs, in area B, 4,933 and in area C, 1,337. These 

 figures are not directly comparable to those of the 1948 census be- 

 cause of the improved methods used to obtain them. However, there 

 are indications that the attrition rate for bergs traveling from the 

 glacier fronts in "West Greenland around Baffin Bay in a counter- 

 clockwise direction enroute to the Grand Banks may be greater than 

 90 percent. The results of a census in 1950 executed in the same 

 manner as the 1949 census should enable a quantitative analysis to 

 be made which will add to the growing knowledge of the factors 

 affecting the drift of icebergs into the Grand Banks region. 



43 



