13 



mediate stage between these two maps. It can be safely said that 

 the berg followed in general the pattern depicted by the current chart, 

 51° 50° 49° 48° 47° 46° 



Figure 3. The observed drift of an iceberg from May 29 to June 18 plotted against the stream lines of the 

 current map completed June 6, north of latitude 42° N., and the current map completed July 3, south of 

 latitude 42° N. (See fig;. 46 and 47.) For explanation of symbols see fig. 2. (See text.) 



at least within the time limit of its expected reliability. It must also 

 be admitted that there were, in this particular instance, serious dis- 



