23 



lengths off and scattered in a northwesterly direction from the main 

 piece were several small ice lumps. The temperature of the sea and 

 air at 10 a. m. was 75° F., and 77° F., respectively. The captain 

 further states that this ice was observed by his officers as well as 

 himself. 



JULY 1934 (FIG. 16) 



In July it is estimated that 14 different bergs were south of latitude 

 48. Nine of these were between longitude 50°30' and the Newfound- 

 land coast. The other five were near longitude 46. The southern- 

 most reported position of ice during the month was a berg in 45°45' N., 

 45°48' W., on July 3. This berg drifted south during June and at the 

 beginning of July was drifting northeastward at 10 miles per day. 

 The easternmost position of ice in vicinity of the Grand Banks was a 

 berg in 48°02' N., 45°26' W., on July 20. 



SUMMARY 



The number of bergs in the ice-patrol area in the vicinity of the 

 Grand Banks was considerably greater than the average year. April 

 and May were the two heaviest ice months. During April the bergs 

 were concentrated in the shoal water on the Grand Banks, while in 

 May the ice was almost entirely east of the Grand Banks. A berg in 

 May, with exception of the ice reported in 30°50' N., 45°06' W., was 

 the only one during the season to drift south of the tail of the Grand 

 Banks in latitude 43. A berg in June, in 43°50' N., 43°25' W., 

 threatened the westbound track B. While the ice season was heavier 

 than usual the menace to the European-United States tracks was 

 considerably less than normal. The estimated number of bergs to 

 drift south of latitude 48°00' N., during the period from January 1 to 

 August 1, 1934, is 575. The forecast based upon the formulae de- 

 scribed in Coast Guard Bulletin 19, part 3, pages 180-189, was 700 

 icebergs. The number of bergs south of latitude 48 for an average 

 year is 419. Probable drift tracks of ice are rather well known from 

 experience and from current charts drawn from data collected during 

 the current season. Therefore a berg reported from one position is 

 frequently assumed to be identical with a berg reported several days 

 earlier from another position and therefore eliminated from the total 

 of bergs for the season. A complete table of ice reports received begins 

 on page 24. 



The following tables show how the 1934 monthly iceberg totals 

 compare with those of recent years and also with the average year. 

 The average is given for the 35-year period 1900-34, inclusive: 



