Tliis effect was exactly as described in Professor Barnes' report. 

 However, aside from a few small growlers calved around the waterline 

 and a small crater, there appeared to be little other effect. 



Fioure 22a shows the boarding party landing on the second iceberg 

 for the planting of the second and third set of charges. The size of 

 the berg can be seen relative to the men standing on the left shelf. 

 The second detonation took place on this shelf and the results were 

 similar to the first detonation. 



Figure 22b is the final burst which consisted of 560 pounds of 

 thermite planted at the ])ase of tlie large pinnacle. Again a mag- 

 nificent display took place as smoke and molten iron was hurled 

 hundreds of feet into the aii'. but the berg remained virtually un- 

 changed. This concluded tlie thermite tests. 



AVhik^ (he results were disappointing, tliey clearly sliow tliat this 

 type of detonation will not necessarily cause the resuhant disintegra- 

 tion that was described by Professor Barnes. 



The third and last phase of the demolition experiments were con- 

 ducted in two parts. The first part consisted of filling practice bombs 

 with carbon black and various other substances. The Ice Patrol is 

 indebted to the United Carbon Co. of New York for their kind dona- 

 tion of 150 pounds of KOSMOS-60 brand carbon black. The other 

 substances included sand, ground clay, metal filings, water and oil 

 in various mixtures. The bombs were dropped from a special chute 

 ori a R5D (Douglas DC-4) patrol airci'aCl. Although some difficulty 



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Figure 22a. — Party boards large berg. 

 28 



