70 



mensurate with the drift rate of the ice, viz., 1 to 1.4 knots per hour 

 If we compare the behavior of these two bergs as to their progressive 

 movement southward between the forty-eighth and forty-ninth 

 meridians, with a distribution of icebergs south of Newfoundland 

 1900-1926 (see fig. 25), we immediately note the tendency of the ice 

 to attain an extremely far south position takes place between these 

 two meridians of longitudes almost without exception. On June 4 

 two boats were lowered from the Tampa and directed to wire drag 

 berg B, in order that data might be compiled by the ice patrol re- 

 garding the draft, volume, etc., characteristic of Arctic icebergs. At 



A^ 



4.e> 



AZ 



A\ 



•^1 





^9 



4Z 



A^ 



Fig. 19.— The drift of bergs A and B across the westbound steamship lanes 

 June 1 to 6, 1926, inclusive 



the same time that the small boats were working on this job measure- 

 ments as to the exposed surface of the ice were made on the Tampa by 

 means of sextant and range finder. The wire dragging operations, 

 unfortunately, were unsuccessful due to the parting of the span 

 which consisted of a condemned sounding machine wire. The above 

 water dimensions were found, however, to be 382 feet long, and an 

 average height above water of 42 feet. This was at 4 p. m. on June 4, 

 latitude 41° 06.5' north, longitude 48° 27' west. At 6 p. m. a large 

 square tower on the right-hand side of the berg fell off causing that 

 end to rise, setting up new strains which resulted in cleaving the berg 



