Figure 18b.— Direct hit of 1,000-lb. G.P. bomb. 



Figure 20b shows the resuh of a bomb hit on 29 May high up on the 

 side of the berg. Such high hits caused httle damage. Again the shelf 

 has risen out of the water. Tlie berg did not materialy change in size 

 or attitude after this Int. Tlie hist bomb was dropped on 30 May. 



At the conclusion of the tests, the iceberg was estimated to be ])e- 

 tween one-fourth to one-third smaller than at the outset of the tests. 

 The observed disintegration is attributed to both natural deterioration 

 and the effect of the bombing. Although the proportion for which 

 either factor was responsible cannot be definitely established, it is be- 

 lieved that the bombing was the predominant factor. It should be 

 noted, however, that natural forces had destroyed the iceberg by 20 

 June. 



The second phase of iceberg destruction study was an attempt to 

 repeat the experiments of the late Prof. H. T. Barnes of McGill 

 University wlio experimented in iceberg demolition by the use of 

 thermite. Professor Barnes reported great success in the virtual 



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