11 



was 46° F. Tlirce hundred yards west of the berg the water tempera- 

 ture had increased to 50°. Three liundred yards east of the berg 

 it was 55°. Two iiours hiter the berg was in 46° water. At 10 p. m. 

 the temperature of the sea water had increased to 56°. 



At 5 a. m. June 8 visibiHty decreased to 400 yards. The Pontchar- 

 train maneuvered so as to keep tlie iceberg in sight. At 2:40 p. m. 

 the Pontchartrain left tlie berg in 44°05' N., 43°44' W., and proceeded 

 to the westward to contact the Mendota. Tlie Mendota was met in 

 42°26' N., 51°50' W., at 8 p. m., June 9, 1934, and the Mewc?oto relieved 

 the Pontchartrain as ice-patrol vessel. The Pontchartrain then pro- 

 ceeded to Hahfax, Nova Scotia. 



During the cruise 42 bergs were reported south of latitude 48°. 

 Twenty-seven of these were north of latitude 47°30' N. Eleven bergs 

 were south of latitude 45°. One of these broke up and melted just 

 south of the tail of the Grand Banks on May 28. On June 1 there 

 were eight bergs near latitude 44°00' N., between longitudes 48 W., 

 and 49°05' W. On June 5 all of these bergs had disappeared and one 

 other berg had drifted into tliis area from north of latitude 45°. 

 At the end of the cruise on June 9 there were only seven known bergs 

 south of latitude 47°30' N. Four of these bergs were south of latitude 

 45° N. The isotherm chart for this cruise indicated that bergs drift- 

 ing south of latitude 45° would follow an easterly course along the 

 forty-fourth parallel. 



The winds during the cruise were somewhat stronger than those 

 encountered on previous cruises tliis season. On one occasion the 

 wind reached a fresh gale and on tliree occasions that of a strong 

 breeze. The visibility was better than usual for tliis season. The 

 visibility was less than 2 miles 28.9 percent of the time; less than 4 

 miles 35.1 percent of the time. 



The following is a summary of the ice- and water-temperature 

 reports received: 



Estimated number of bergs south of latitude 48° N 43 



Estimated number of bergs south of latitude 45° N 11 



Estimated luimber of bergs south of latitude 43° N 1 



Number of ice reports received 285 



Number of water-temperature reports received 820 



Number of ships furnishing ice reports 64 



Number of ships furnishing water-temperature reports 183 



Number of ships furnished special ice inf Ofination 11 



Figure 6 shows track of patrol vessel, surface isotherms and ice 

 conditions for this cruise. 



98591—35- 



